Added imports for the extended character entity sets Latin 1,

Symbols and Special: for convenience all XML docs which use
common.dtd can now use the well-known character entities instead
of their numerical counterparts. For a complete reference see
the corresponding .ent-files in the w3c directory.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@97934 13f79535-47bb-0310-9956-ffa450edef68