Be less tolerant when parsing the credencial for Basic authorization. Only spaces...

Be less tolerant when parsing the credencial for Basic authorization. Only spaces  should be accepted after the authorization scheme. \t are also tolerated.

The current code accepts \v and \f as well.

The same behavior is already used in 'ap_get_basic_auth_pw()' which is mostly the same function as 'get_basic_auth()'.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1817131 13f79535-47bb-0310-9956-ffa450edef68