fix threading bug in pyshell

plugins/python/pyloader.c

@@ -513,7 +513,7 @@ PyObject *uwsgi_file_loader(void *arg1) {
 	char *callable = up.callable;
 	if (!callable) callable = "application";
 
-	wsgi_file_module = uwsgi_pyimport_by_filename("uwsgi_wsgi_file", filename);
+	wsgi_file_module = uwsgi_pyimport_by_filename(uwsgi_pythonize(filename), filename);
 	if (!wsgi_file_module) {
 		PyErr_Print();
 		exit(1);

plugins/python/python_plugin.c

@@ -1317,6 +1317,8 @@ void uwsgi_python_fixup() {
 
 void uwsgi_python_hijack(void) {
 	// the pyshell will be execute only in the first worker
+
+	UWSGI_GET_GIL;
 	if (up.pyshell && uwsgi.mywid == 1) {
 		PyImport_ImportModule("readline");
 		PyRun_InteractiveLoop(stdin, "uwsgi");

plugins/python/uwsgi_python.h

@@ -261,6 +261,8 @@ int uwsgi_python_profiler_call(PyObject *, PyFrameObject *, int, PyObject *);
 
 void uwsgi_python_reset_random_seed(void);
 
+char *uwsgi_pythonize(char *);
+
 #ifdef __linux__
 #ifndef PYTHREE
 int uwsgi_init_symbol_import(void);