-c and -C binary args: Properly validate module dependencies

Along with script syntax validation, the "-c" and "-C" binary arguments should
also ensure all necessary modules are loaded.

Reported by Maxim Sobolev
Fixes #616

(cherry picked from commit 82c3fd6)

main.c

@@ -1033,6 +1033,12 @@ int main(int argc, char** argv)
 		LM_ERR("bad function call in config file\n");
 		return ret;
 	}
+
+	if (solve_module_dependencies(modules) != 0) {
+		LM_ERR("failed to solve module dependencies\n");
+		return -1;
+	}
+
 #ifdef EXTRA_DEBUG
 	print_rl();
 #endif

sr_module.c

@@ -673,11 +673,6 @@ int init_modules(void)
 {
 	int ret;
 
-	if (solve_module_dependencies(modules) != 0) {
-		LM_ERR("failed to solve module dependencies\n");
-		return -1;
-	}
-
 	ret = init_mod(modules, 0);
 
 	free_module_dependencies(modules);