Reverted one of my yesterday commits - this fixes release build on a lot of platforms

Author: AlexPeshkoff

src/jrd/Resources.h

@@ -191,6 +191,7 @@ class CachedResource
 	FB_SIZE_T versionOffset;
 };
 
+// This specialization is required for successful initialization of database
 template <>
 jrd_rel* CachedResource<jrd_rel, RelationPermanent>::operator()(thread_db* tdbb) const;