Backport: r1610383

Submitted by: jailletc36
Simplify code.

Cases where 'loc' doesn't have any ':' or is  starting with ':' are already
handled by 'ap_is_url()'
Calling 'apr_isascii()' seems useless.




git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x-merge-http-strict@1768969 13f79535-47bb-0310-9956-ffa450edef68