Use wp_safe_remote_request() and friends instead of reject_unsafe_urls = true.

fixes #24646.



git-svn-id: http://core.svn.wordpress.org/trunk@24917 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Compress scripts/styles: 3.7-alpha-24919.

git-svn-id: http://core.svn.wordpress.org/trunk@24919 1a063a9b-81f0-0310-95a4-ce76da25c4cd