Merge upstream/master into merge/upstream-full

Merge profanity-im/profanity master (373 commits) into cproof fork.

Source changes (manual merge):
- src/command/: cmd_defs, cmd_funcs, cmd_ac — upstream g_new0, auto_gchar,
  launch_editor callback; keep our XEP-0308 LMC, force-encryption, CWE-134
- src/config/: preferences, tlscerts, account — upstream UNIQUE dedup,
  dynamic pad capacity; keep our db_history_result_t, scroll logic
- src/database.*: upstream g_new0 memory mgmt; keep our return types,
  add null-check fix for msg->timestamp
- src/omemo/, src/pgp/: upstream _gpgme_key_get_email, g_new0;
  keep our replace_id in omemo_on_message_send
- src/tools/: editor, http_upload, bookmark_ignore — upstream launch_editor
  callback API
- src/ui/: console, window, chatwin, mucwin, inputwin, buffer —
  upstream win_warn_needed/sent dedup, PAD_MIN_HEIGHT dynamic pads;
  keep our y_start_pos scroll, _truncate_datetime_suffix
- src/xmpp/: message, stanza, presence, roster_list, iq, session —
  upstream connection_get_available_resources; keep our LMC stanza logic
- src/common.c: fix format-security (cons_show)

Build system:
- Makefile.am: updated test paths to subdirectory structure, added
  test_cmd_ac, test_forced_encryption
- Restored autotools files deleted by upstream meson migration:
  bootstrap.sh, autogen.sh, m4/ax_valgrind_check.m4, configure-debug

Tests:
- Unit tests: upstream unittests.c base + our forced_encryption tests
  (482 passed, 0 failed across all 4 configurations)
- Functional tests: kept our version (93 passed, 0 failed)
  upstream version requires stbbr_for_xmlns not yet in our stabber fork
- Updated test stubs: stub_xmpp.c, stub_omemo.c from upstream

Compile fixes:
- src/common.c: cons_show(errmsg) -> cons_show("%s", errmsg)
- src/database.c: null-check before msg->timestamp access
- src/ui/console.c: size_t -> (int) cast for format width
- src/config/tlscerts.c: %d -> %zu for size_t

src/profanity.c

@@ -3,35 +3,9 @@
  * vim: expandtab:ts=4:sts=4:sw=4
  *
  * Copyright (C) 2012 - 2019 James Booth <boothj5@gmail.com>
- * Copyright (C) 2019 - 2025 Michael Vetter <jubalh@iodoru.org>
- *
- * This file is part of Profanity.
- *
- * Profanity is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Profanity is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Profanity.  If not, see <https://www.gnu.org/licenses/>.
- *
- * In addition, as a special exception, the copyright holders give permission to
- * link the code of portions of this program with the OpenSSL library under
- * certain conditions as described in each individual source file, and
- * distribute linked combinations including the two.
- *
- * You must obey the GNU General Public License in all respects for all of the
- * code used other than OpenSSL. If you modify file(s) with this exception, you
- * may extend this exception to your version of the file(s), but you are not
- * obligated to do so. If you do not wish to do so, delete this exception
- * statement from your version. If you delete this exception statement from all
- * source files in the program, then also delete it here.
+ * Copyright (C) 2019 - 2026 Michael Vetter <jubalh@iodoru.org>
  *
+ * SPDX-License-Identifier: GPL-3.0-or-later WITH OpenSSL-exception
  */
 #include "config.h"
 #include <unistd.h>
@@ -56,6 +30,7 @@
 #include "config/accounts.h"
 #include "config/preferences.h"
 #include "config/theme.h"
+#include "tools/spellcheck.h"
 #include "config/tlscerts.h"
 #include "config/scripts.h"
 #include "command/cmd_defs.h"
@@ -117,7 +92,7 @@ prof_run(gchar* log_level, gchar* account_name, gchar* config_file, gchar* log_f
     char* line = NULL;
     GTimer* waittimer = g_timer_new();
     g_timer_stop(waittimer);
-    int waittime;
+    int waittime = 0;
     while (cont && !force_quit) {
         log_stderr_handler();
         session_check_autoaway();
@@ -206,6 +181,13 @@ _connect_default(const char* const account)
     }
 }
 
+static void
+sigterm_handler(int sig)
+{
+    log_info("Received signal %d, exiting", sig);
+    force_quit = TRUE;
+}
+
 static void
 _init(char* log_level, char* config_file, char* log_file, char* theme_name)
 {
@@ -215,6 +197,8 @@ _init(char* log_level, char* config_file, char* log_file, char* theme_name)
     signal(SIGINT, SIG_IGN);
     signal(SIGTSTP, SIG_IGN);
     signal(SIGWINCH, ui_sigwinch_handler);
+    signal(SIGTERM, sigterm_handler);
+    signal(SIGHUP, sigterm_handler);
     if (pthread_mutex_init(&lock, NULL) != 0) {
         log_error("Mutex init failed");
         exit(1);
@@ -262,6 +246,7 @@ _init(char* log_level, char* config_file, char* log_file, char* theme_name)
 #ifdef HAVE_OMEMO
     omemo_init();
 #endif
+    spellcheck_init();
     atexit(_shutdown);
     plugins_init();
 #ifdef HAVE_GTK
@@ -294,7 +279,7 @@ prof_add_shutdown_routine(void (*routine)(void))
     if (g_list_find_custom(shutdown_routines, &this, (GCompareFunc)_cmp_shutdown_routine)) {
         return;
     }
-    struct shutdown_routine* r = malloc(sizeof *r);
+    struct shutdown_routine* r = g_new(struct shutdown_routine, 1);
     r->routine = routine;
     shutdown_routines = g_list_prepend(shutdown_routines, r);
 }