revert: restore pre-upstream-merge baseline (tree of 3b673150b)

Roll the tree back to the pre-merge tip 3b673150b, undoing the upstream sync merge 72f4f186d (303 files) and the 13 post-merge commits layered on top of it.

Purpose: restore the last pre-sync baseline so the reported OMEMO/OTR encryption regressions can be reproduced against a known-good state and the upstream sync ruled in or out as the cause. Nothing is dropped from history; the merge and every post-merge commit remain reachable and can be cherry-picked back selectively.

Baseline:     3b673150b chore(chatlog): disable background message file logging (stage 1)

Undoes merge: 72f4f186d merge: sync upstream profanity-im/profanity

tests/unittests/omemo/stub_omemo.c

@@ -9,7 +9,7 @@ omemo_init(void)
 }
 
 char*
-omemo_fingerprint_autocomplete(const char* const search_str, gboolean previous, void* context)
+omemo_fingerprint_autocomplete(const char* const search_str, gboolean previous)
 {
     return NULL;
 }
@@ -42,30 +42,12 @@ omemo_is_trusted_identity(const char* const jid, const char* const fingerprint)
     return TRUE;
 }
 
-gboolean
-omemo_is_jid_trusted(const char* const jid)
-{
-    return TRUE;
-}
-
-GList*
-omemo_get_jid_untrusted_fingerprints(const char* const jid)
-{
-    return NULL;
-}
-
 GList*
 omemo_known_device_identities(const char* const jid)
 {
     return NULL;
 }
 
-gboolean
-omemo_is_device_active(const char* const jid, const char* const fingerprint)
-{
-    return TRUE;
-}
-
 gboolean
 omemo_loaded(void)
 {
@@ -82,7 +64,7 @@ omemo_on_disconnect(void)
 }
 
 char*
-omemo_on_message_send(ProfWin* win, const char* const message, gboolean request_receipt, gboolean muc, const char* const replace_id)
+omemo_on_message_send(ProfWin* win, const char* const message, gboolean request_receipt, gboolean muc)
 {
     return NULL;
 }
@@ -129,23 +111,6 @@ omemo_encrypt_file(FILE* in, FILE* out, off_t file_size, int* gcry_res)
 };
 void omemo_free(void* a) {};
 
-char*
-omemo_on_message_recv(const char* const from, uint32_t sid,
-                      const unsigned char* const iv, size_t iv_len,
-                      GList* keys, const unsigned char* const payload,
-                      size_t payload_len, gboolean muc, gboolean* trusted, omemo_error_t* error)
-{
-    *error = OMEMO_ERR_NONE;
-    return NULL;
-}
-
-char*
-omemo_receive_message(xmpp_stanza_t* const stanza, gboolean* trusted, omemo_error_t* error)
-{
-    *error = OMEMO_ERR_NONE;
-    return NULL;
-}
-
 uint32_t
 omemo_device_id()
 {