Change the SSLCipherSuite default to a shorter, whitelist

oriented definition, and add an example for a speed-optimized
configuration (commented out by default).

In the SSL How-To, streamline the SSLCipherSuite examples where
applicable (explicitly banning EXP and NULL is not needed when
only HIGH is specified).


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1203752 13f79535-47bb-0310-9956-ffa450edef68