Don't use mysql_real_escape_string() in BP_Signup

This causes problems on PHP 5.5+, where the mysql_* functions have been
deprecated.

See #5374

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8121 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Better verbiage for "Pending Accounts". See #5374

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8122 cdf35c40-ae34-48e0-9cc9-0c9da1808c22