Use OTP application startup infrastructure for starting dependencies

src/ejabberd.app.src.in

@@ -5,7 +5,7 @@
   {vsn, "@PACKAGE_VERSION@"},
   {modules, []},
   {registered, []},
-  {applications, [kernel, stdlib]},
+  {applications, [kernel, stdlib, crypto, sasl, ssl, p1_utils, fast_yaml, fast_tls, pkix, xmpp, cache_tab, eimp]},
   {env, [{enabled_backends, [@enabled_backends@]}]},
   {mod, {ejabberd_app, []}}]}.
 

src/ejabberd.erl

@@ -44,7 +44,8 @@
 
 start() ->
     %%ejabberd_cover:start(),
-    application:start(ejabberd).
+    ejabberd_logger:start(),
+    application:ensure_all_started(ejabberd).
 
 stop() ->
     application:stop(ejabberd).

src/ejabberd_app.erl

@@ -39,9 +39,7 @@
 
 start(normal, _Args) ->
     {T1, _} = statistics(wall_clock),
-    ejabberd_logger:start(),
     write_pid_file(),
-    start_apps(),
     start_elixir_application(),
     ejabberd:check_app(ejabberd),
     setup_if_elixir_conf_used(),
@@ -148,18 +146,6 @@ file_queue_init() ->
 	       end,
     p1_queue:start(QueueDir).
 
-start_apps() ->
-    crypto:start(),
-    ejabberd:start_app(sasl),
-    ejabberd:start_app(ssl),
-    ejabberd:start_app(p1_utils),
-    ejabberd:start_app(fast_yaml),
-    ejabberd:start_app(fast_tls),
-    ejabberd:start_app(pkix),
-    ejabberd:start_app(xmpp),
-    ejabberd:start_app(cache_tab),
-    ejabberd:start_app(eimp).
-
 setup_if_elixir_conf_used() ->
   case ejabberd_config:is_using_elixir_config() of
     true -> 'Elixir.Ejabberd.Config.Store':start_link();