Backport:

mod_session: Sessions are encoded as application/x-www-form-urlencoded strings,
however we do not handle the encoding of spaces properly. Fixed.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1293889 13f79535-47bb-0310-9956-ffa450edef68