-Its now possible to add support for other edict_private structs easily.

-Its now possible to add support for other edict_private structs easily.
(Note: You have to derive them by composition from the original one -
e.g. struct server_edict_private_s { prvm_edict_private_t base; ... };
or just copy the elements from prvm_edict_private_t into the new struct -
and add them to the anonymous union p in prvm_edict_t.)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@4623 d7cf8633-e32d-0410-b094-e92efae38249