Undo gmainloop related changes

Revert "Merge pull request #1943 from H3rnand3zzz/gmainloop

This reverts commit 609fde0998, reversing
changes made to 2ec94064ed.

Revert "Merge pull request #1948 from H3rnand3zzz/fix/rl-less-refreshes"

This reverts commit 11762fd2b0, reversing
changes made to 609fde0998.

We have got several issues, that we don't quite see how to solve, with
the merge of the gmainloop PR.

* Slashguard is broken (#1955) (though #1956 could fix that)
* One person reported problems with copy paste selection via mouse
* Some input buffer seems not to be cleared correctly
  It happened that I was debugging profanity used `/connect` and typed
  the password. I then debugged so long that a time out occurred, so
  profanity disconnected. Then it printed "unknown command: $password".

There was something else that I forgot now.

Bottomline is: so far we didn't get it right so we will undo these
changes until someone proposes a working solution.

We got a slight performance increase (apparently noticable when
alt+mouse scrolling) but got too many issues with this change.

src/profanity.c

@@ -43,7 +43,6 @@
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
-#include <stdio.h>
 
 #include <glib.h>
 
@@ -61,7 +60,6 @@
 #include "command/cmd_defs.h"
 #include "plugins/plugins.h"
 #include "event/client_events.h"
-#include "ui/inputwin.h"
 #include "ui/ui.h"
 #include "ui/window_list.h"
 #include "xmpp/resource.h"
@@ -88,15 +86,15 @@
 static void _init(char* log_level, char* config_file, char* log_file, char* theme_name);
 static void _shutdown(void);
 static void _connect_default(const char* const account);
-static gboolean _main_update(gpointer data);
 
 pthread_mutex_t lock;
 static gboolean force_quit = FALSE;
-GMainLoop* mainloop = NULL;
 
 void
 prof_run(char* log_level, char* account_name, char* config_file, char* log_file, char* theme_name)
 {
+    gboolean cont = TRUE;
+
     _init(log_level, config_file, log_file, theme_name);
     plugins_on_start();
     _connect_default(account_name);
@@ -107,10 +105,33 @@ prof_run(char* log_level, char* account_name, char* config_file, char* log_file,
 
     session_init_activity();
 
-    mainloop = g_main_loop_new(NULL, TRUE);
-    g_timeout_add(1000 / 60, _main_update, NULL);
-    inp_add_watch();
-    g_main_loop_run(mainloop);
+    char* line = NULL;
+    while (cont && !force_quit) {
+        log_stderr_handler();
+        session_check_autoaway();
+
+        line = inp_readline();
+        if (line) {
+            ProfWin* window = wins_get_current();
+            cont = cmd_process_input(window, line);
+            free(line);
+            line = NULL;
+        } else {
+            cont = TRUE;
+        }
+
+#ifdef HAVE_LIBOTR
+        otr_poll();
+#endif
+        plugins_run_timed();
+        notify_remind();
+        session_process_events();
+        iq_autoping_check();
+        ui_update();
+#ifdef HAVE_GTK
+        tray_update();
+#endif
+    }
 }
 
 void
@@ -119,29 +140,6 @@ prof_set_quit(void)
     force_quit = TRUE;
 }
 
-static gboolean
-_main_update(gpointer data)
-{
-    log_stderr_handler();
-    session_check_autoaway();
-
-#ifdef HAVE_LIBOTR
-    otr_poll();
-#endif
-    plugins_run_timed();
-    notify_remind();
-    session_process_events();
-    iq_autoping_check();
-    ui_update();
-    chat_state_idle();
-#ifdef HAVE_GTK
-    tray_update();
-#endif
-
-    // Always repeat
-    return TRUE;
-}
-
 static void
 _connect_default(const char* const account)
 {