Add connection_get_profanity_identifier stub

And move defintion to xmpp.h

tests/unittests/test_server_events.c

@@ -7,6 +7,7 @@
 #include <glib.h>
 
 #include "event/server_events.h"
+#include "xmpp/xmpp.h"
 #include "xmpp/roster_list.h"
 #include "xmpp/chat_session.h"
 #include "config/preferences.h"

tests/unittests/xmpp/stub_connection.c

@@ -0,0 +1,7 @@
+#include "xmpp/message.h"
+
+ProfMessage *message_init(void) {
+    return NULL;
+}
+
+void message_free(ProfMessage *message) {}

tests/unittests/xmpp/stub_xmpp.c

@@ -92,6 +92,10 @@ connection_supports(const char *const feature)
     return FALSE;
 }
 
+char *connection_get_profanity_identifier(void) {
+    return "profident";
+}
+
 // message functions
 char* message_send_chat(const char * const barejid, const char * const msg, const char *const oob_url,
     gboolean request_receipt)