1. Update 4.2.7p474 --> 4.2.7p475

2. Remove two dead download mirrors, add an official mirror.
   	PR:		193520
   	Submitted by:	jharris@widomaker.com


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@368004 35697150-7ecd-e111-bb59-0022644237b5