adm_proto.h: Change usage of INTERFACE to use KRB5_CALLCONV and KRB5_DLLIMP

adm_proto.h: Change usage of INTERFACE to use KRB5_CALLCONV and KRB5_DLLIMP

winsock.h: Rename to kwinsock.h.  Recent versions of Microsoft
	compilers include winsock.h, and the one we have collides with NT
	errno definitions.  Using the one provided by the compiler is
	preferable.  If you are using an old version of MSVC that doesn't
	include winsock.h, then rename kwinsock.h to winsock.h

kdb_dbm.h: Don't include kdb_dbm.h for Win-32.

kdb.h: Don't include most of kdb.h for Win-32.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@8306 dc483132-0cff-0310-8789-dd5450dbe970