Fix SOCKS4 support (missing SOCKSinit, non-portable grep in Configure and

wrong if-statement for Solaris) and add additional SOCKS5 support.

PR: 2140


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81048 13f79535-47bb-0310-9956-ffa450edef68