* krb524.h: Updated C++ protection to not interfere with emacs

	* krb524.h: Updated C++ protection to not interfere with emacs
	auto indentation and added KRB524_PRIVATE macro for Mac OS X to
	control visibility of function prototypes

	* krb524.h: Added C++ protection and Mac pragmas

	* krb524.h, cnv_tkt_skey.c, conv_creds.c, conv_princ.c, encode.c,
	misc.c, sendmsg.c: Updated header paths on Mac OS X so that we
	correctly include the autogenerated krb524.h

	* conv_creds.c, cnv_tkt_skey.c: added cast to remove warning.

	* krb524.h: Updated to new Mac OS header layout.

	* sendmsg.c: k5-int.h should be included as a local header

	[pullups from 1-2-2-branch]

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@14507 dc483132-0cff-0310-8789-dd5450dbe970