merge: sync upstream profanity-im/profanity

Sync with upstream profanity-im/profanity.

Major upstream changes incorporated:

Memory management
  - Replace malloc+memset with g_new0 throughout codebase
  - Adopt auto_gchar / auto_gcharv / auto_gerror / auto_jid cleanup macros
  - Replace free() with g_free() for GAlloc'd memory

Editor rewrite
  - Remove pthread-based async editor; use GChildWatch callback API
  - New launch_editor(initial_content, callback, user_data) interface
  - Proper signal handling (SIGINT, SIGTSTP, SIGPIPE reset in child)
  - ui_suspend()/ui_resume() integration for TTY management

OMEMO improvements
  - Dual backend support: libsignal-protocol-c and libomemo-c
  - Proper pre-key removal after use (XEP-0384 compliance)
  - Automatic pre-key regeneration when store drops below threshold
  - New functions: omemo_is_device_active(), omemo_is_jid_trusted()
  - omemo_get_jid_untrusted_fingerprints() for better error messages
  - Fingerprint notifications on new device identity discovery
  - Deterministic pre-key ID generation tracking max_pre_key_id
  - omemo_trust_changed() UI updates on trust state changes

JID validation
  - RFC 6122-compliant validation in jid_is_valid()
  - Character-level checks (RFC 6122 forbidden chars: & ' / : < > @)
  - Length limits: 1023 per component, 3071 total
  - New jid_is_valid_user_jid() for user vs. service JID distinction

Database
  - Schema migration v3: UNIQUE constraint on archive_id for deduplication
  - Triggers for corrected message tracking (replaces_db_id / replaced_by_db_id)
  - db_history_result_t return type, _truncate_datetime_suffix()

UI / console
  - win_warn_needed() / win_warn_sent() warning deduplication hash table
  - PAD_MIN_HEIGHT dynamic pad sizing with PAD_THRESHOLD auto-cleanup
  - Spellcheck integration in input field with Unicode word detection
  - cons_spellcheck_setting() for /settings ui output
  - /[command]? shortcut for command help

Account config
  - Account name sanitization for GKeyFile special chars ([ ] = # \n \r)
  - Replace popen() with g_spawn_sync() for eval_password
  - TLS policy: add "direct" option alongside legacy

Connection
  - Port validation with g_assert (0–65535)
  - SHA-256 certificate fingerprint support (XMPP_CERT_PUBKEY_FINGERPRINT_SHA256)
  - "direct" TLS policy alias for legacy SSL

Common utilities
  - str_xml_sanitize() for XML 1.0 illegal character removal
  - string_matches_one_of() with formatted error messages
  - valid_tls_policy_option() helper
  - prof_date_time_format_iso8601() utility
  - Improved strip_arg_quotes() with backslash unescaping
  - prof_occurrences() uses g_slist_prepend + reverse for performance

PGP / OX
  - Proper GPGME resource cleanup with goto-cleanup pattern
  - g_string_free(xmppuri) leak fix in _ox_key_lookup

CSV export
  - Use GString + g_file_set_contents instead of raw write() syscalls

Tests
  - Restructured into subdirectories: command/, config/, xmpp/, ui/, omemo/, otr/, pgp/
  - New test_cmd_ac.c for autocompleter unit tests
  - Updated stubs for new UI suspend/resume functions

License headers
  - Migrate to SPDX-3.0 identifiers (GPL-3.0-or-later WITH OpenSSL-exception)

────────────────────────────────────────────────────
cproof-specific preservations:

  - XEP-0308 LMC: replace_id ?: id logic in message/stanza/omemo
  - Force encryption: cmd_force_encryption, test_forced_encryption
  - CWE-134: format string protection (cons_show("%s", ...))
  - y_start_pos-based paging in window.c
  - db_history_result_t return type, _truncate_datetime_suffix()

Merge-time fixes:

  - common.c: format-security (-Werror) — cons_show(errmsg) → cons_show("%s", errmsg)
  - database.c: null-deref guard — !msg->timestamp → msg && !msg->timestamp
  - console.c: implicit size_t → int cast — (int)(maxlen + 1)
  - tlscerts.c: %d for size_t — %zu

Build system:
  - Kept autotools (Makefile.am, configure.ac); upstream uses Meson
  - Restored deleted files: bootstrap.sh, autogen.sh, ax_valgrind_check.m4, configure-debug
  - Updated Makefile.am test paths for subdirectory structure
  - Added test_cmd_ac, test_forced_encryption to test sources

Functional tests:
  - Use cproof version; upstream requires stbbr_for_xmlns from updated stabber
  - Not yet available in devs/stabber fork

Closes #64

Merge author: jabber.developer2
Commits authors:
 Michael Vetter <jubalh@iodoru.org>
& Steffen Jaeckel <s@jaeckel.eu>

RELEASE_GUIDE.md

@@ -2,67 +2,40 @@
 
 * Release libstrophe if required
 
-* Run Unit tests: `make check-unit`
-* Run Functional tests - Currently disabled
-* Run manual valgrind tests for new features
-* Build and simple tests in Virtual machines ideally all dists including OSX and Windows (Cygwin)
+* Set the correct release version in meson.build
+
+* Run Unit tests: `meson setup build_test -Dtests=true && meson test -C build_test`
+* Run Functional tests: same as above but needs stabber installed
 
-* Update Inline command help (./src/command/cmd_defs.c)
 * Check copyright dates in all files
 
+* Create clean build folder:
+  `meson setup build_deb --buildtype=debug -Dnotifications=enabled -Dicons-and-clipboard=enabled -Dotr=enabled -Dpgp=enabled -Domemo=enabled -Dc-plugins=enabled -Dpython-plugins=enabled -Dxscreensaver=enabled -Domemo-qrcode=enabled -Dgdk-pixbuf=enabled`
+
+* Build profanity: `meson compile -C build_deb`
+
 * Generate HTML docs (the docgen argument only works when package status is development)
-    `./profanity docgen`
+    `./build_deb/profanity docgen`
+
+* Generate manpages (the mangen argument only works when package status is development)
+    `./build_deb/profanity mangen`
 
 * Determine if `libprofanity`'s version needs to be [increased](https://github.com/profanity-im/profanity/issues/973)
 * Update plugin API docs (./apidocs/c and ./apidocs/python) need to run the `gen.sh` and commit the results to the website git repo
-* Update CHANGELOG
+* Update CHANGELOG (Use scripts/changelog-helper.py)
 * Update profrc.example
 * Update profanity.doap (new XEPs and latest version). Look for `DEV` which marks what is done on the development branch.
 * Add new release to profanity.doap
 
-## Creating artefacts
-* Set the correct release version in configure.ac:
-
-```
-AC_INIT([profanity], [0.6.0], [boothj5web@gmail.com])
-```
-
-* Set the package status in configure.ac:
-```
-PACKAGE_STATUS="release"
-```
+* Set the package status to release: `meson setup build_rel --buildtype=release`
 
 * Update date and version in man pages (profanity.1, profanity-ox-setup.1)
-* Generate manpages for profanity commands (the mangen argument only works when package status is development)
-    `./profanity mangen`
-  These files should be added to the docs subfolder and added to git whenever a command changes.
-
 * Add generated command manpages: `git add docs/profanity-*.1`
 
-* Commit
+* Commit (Release 0.1.2)
 * Tag (0.1.2)
-* Push
 
-* Configure to generate fresh Makefile:
-
-```
-./bootstrap.sh && ./configure
-```
-
-* Generate tarballs:
-
-```
-make dist
-make dist-bzip2
-make dist-xz
-make dist-zip
-```
-
-* Set the package status back to dev:
-
-```
-PACKAGE_STATUS="development"
-```
+* Generate tarballs: `meson dist -C build_rel --formats xztar,zip`
 
 * Remove generated command manpages:
   `git rm docs/profanity-*.1`
@@ -71,13 +44,3 @@ PACKAGE_STATUS="development"
 
 * Commit `Start new cycle`
 * Push
-
-## Updating website
-  * Make changes to the git repo including uploading the new artefacts at:
-        https://github.com/profanity-im/profanity-im.github.io
-  * Add .xz and .zip tarballs to `tarballs` directory
-  * Copy `guide/latest` to `guide/newversion`
-  * Update tarball location and name in index.html
-  * Update checksums in index.html
-  * Update profanity_version.txt
-  * Take results from profanity.doap and put them into xeps.html