We must set the MIME-type for .shtml files to text/html if we want them

to be parsed for SSI tags.  Add the config for that to the default
config file so that it is easier to enable .shtml parsing.

PR:	9787
Submitted by:	Dave Dyer <ddyer@real-me.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95693 13f79535-47bb-0310-9956-ffa450edef68