Pull in changes from HEAD
	* dcrt0.cc (_cygwin_exit_return): Define to allow usage of same C
	symbol name independent of target.
	* perprocess.h (SIZEOF_PER_PROCESS): Define for x86_64.
	* include/sys/cygwin.h (struct per_process): Tweak definition for
	x86_64.
This commit was manufactured by cvs2svn to create branch 'cygwin-64bit-
branch'.

Cherrypick from master 2013-01-21 04:30:27 UTC Christopher Faylor <me.cygwin2012@cgf.cx> '* update-copyright (update_maybe): Accommodate perl-style copyright comments.':
    winsup/cygwin/update-copyright
Pull in changes from HEAD
	* miscfuncs.cc (__import_address): Fix address computation for 64 bit.