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/plugins/disco.c

@@ -4,33 +4,7 @@
  *
  * Copyright (C) 2012 - 2019 James Booth <boothj5@gmail.com>
  *
- * 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.
- *
+ * SPDX-License-Identifier: GPL-3.0-or-later WITH OpenSSL-exception
  */
 
 #include "config.h"
@@ -60,21 +34,21 @@ disco_add_feature(const char* plugin_name, char* feature)
     }
 
     if (!features) {
-        features = g_hash_table_new_full(g_str_hash, g_str_equal, free, NULL);
+        features = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
     }
     if (!plugin_to_features) {
-        plugin_to_features = g_hash_table_new_full(g_str_hash, g_str_equal, free, (GDestroyNotify)_free_features);
+        plugin_to_features = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, (GDestroyNotify)_free_features);
     }
 
     GHashTable* plugin_features = g_hash_table_lookup(plugin_to_features, plugin_name);
     gboolean added = FALSE;
     if (plugin_features == NULL) {
-        plugin_features = g_hash_table_new_full(g_str_hash, g_str_equal, free, NULL);
-        g_hash_table_add(plugin_features, strdup(feature));
-        g_hash_table_insert(plugin_to_features, strdup(plugin_name), plugin_features);
+        plugin_features = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
+        g_hash_table_add(plugin_features, g_strdup(feature));
+        g_hash_table_insert(plugin_to_features, g_strdup(plugin_name), plugin_features);
         added = TRUE;
     } else if (!g_hash_table_contains(plugin_features, feature)) {
-        g_hash_table_add(plugin_features, strdup(feature));
+        g_hash_table_add(plugin_features, g_strdup(feature));
         added = TRUE;
     }
 
@@ -83,12 +57,12 @@ disco_add_feature(const char* plugin_name, char* feature)
     }
 
     if (!g_hash_table_contains(features, feature)) {
-        g_hash_table_insert(features, strdup(feature), GINT_TO_POINTER(1));
+        g_hash_table_insert(features, g_strdup(feature), GINT_TO_POINTER(1));
     } else {
         void* refcountp = g_hash_table_lookup(features, feature);
         int refcount = GPOINTER_TO_INT(refcountp);
         refcount++;
-        g_hash_table_replace(features, strdup(feature), GINT_TO_POINTER(refcount));
+        g_hash_table_replace(features, g_strdup(feature), GINT_TO_POINTER(refcount));
     }
 }
 
@@ -119,7 +93,7 @@ disco_remove_features(const char* plugin_name)
                 g_hash_table_remove(features, feature);
             } else {
                 refcount--;
-                g_hash_table_replace(features, strdup(feature), GINT_TO_POINTER(refcount));
+                g_hash_table_replace(features, g_strdup(feature), GINT_TO_POINTER(refcount));
             }
         }
     }