In ConfigItem_include include->url now always exists, and src/url.c is now

always compiled in, both regardless of cURL support or not.
Obviously the cURL functions are not available without cURL and there
are now some #ifdef USE_LIBCURL in url.c

This also fixes the current build to work without cURL

include/struct.h

@@ -1896,10 +1896,8 @@ struct ConfigItem_include {
 	ConfigItem_include *prev, *next;
 	ConfigFlag_ban flag;
 	char *file;
-#ifdef USE_LIBCURL
 	char *url;
 	char *errorbuf;
-#endif
 	char *included_from;
 	int included_from_line;
 };