Move cgit_get_repoinfo into shared.c

This function will be usefull when parsing url arguments.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
diff --git a/cgit.h b/cgit.h
index f3d783e..a38981d 100644
--- a/cgit.h
+++ b/cgit.h
@@ -112,6 +112,7 @@
 
 extern int htmlfd;
 
+extern struct repoinfo *cgit_get_repoinfo(const char *url);
 extern void cgit_global_config_cb(const char *name, const char *value);
 extern void cgit_repo_config_cb(const char *name, const char *value);
 extern void cgit_querystring_cb(const char *name, const char *value);