move example blacklist_helo list to docs/ with instructions to install

Jesse Norell

2016-02-08 8c8acac7bb7160e3833b9351bccb8d9c643bddf6

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/^\s*(LoadModule|LoadFile|Include)(\s+|[\\\\])/mi
/^\s*(SuexecUserGroup|suPHP_UserGroup|suPHP_PHPPath|suPHP_ConfigPath)(\s+|[\\\\])/mi
/^\s*(FCGIWrapper|FastCgiExternalServer)(\s+|[\\\\])/mi