Setup FG(default_context) in RINIT/RSHUTDOWN instead of fg_ctor/fg_dtor.

Frees context at right time without double freeing.

ext/standard/basic_functions.c

@@ -1196,6 +1196,9 @@ PHP_RINIT_FUNCTION(basic)
 	/* Reset magic_quotes_runtime */
 	PG(magic_quotes_runtime) = INI_BOOL("magic_quotes_runtime");
 
+	/* Setup default context */
+	FG(default_context) = NULL;
+
 	return SUCCESS;
 }
 
@@ -1244,6 +1247,11 @@ PHP_RSHUTDOWN_FUNCTION(basic)
 		efree(BG(user_filter_map));
 		BG(user_filter_map) = NULL;
 	}
+
+	/* cleanup any default context that was created */
+	if (FG(default_context)) {
+		php_stream_context_free(FG(default_context));
+	}
 	
 	return SUCCESS;
 }

ext/standard/file.c

@@ -137,15 +137,10 @@ static void file_globals_ctor(php_file_globals *file_globals_p TSRMLS_DC)
 	FG(pclose_ret) = 0;
 	FG(user_stream_current_filename) = NULL;
 	FG(def_chunk_size) = PHP_SOCK_CHUNK_SIZE;
-	FG(default_context) = NULL;
 }
 
 static void file_globals_dtor(php_file_globals *file_globals_p TSRMLS_DC)
 {
-	if (FG(default_context)) {
-		/* This is being automagically freed elsewhere */
-		FG(default_context) = NULL;
-	}
 }