[mythtv] mythweb updates always need to mkdir php_sessions

[Andrew Wilson]

Every time I update mythweb ....

mv /var/www/mythweb /var/www/mythweb.old
cp -a /usr/src/mythtv/mythplugins/mythweb /var/www

..... I forget to do this:

mkdir /var/www/mythweb/php_sessions


And mythweb complains, although it still works. 

Is there anything to stop us from creating an empty php_sessions
directory in the CVS tree so that it gets copied with the other stuff
and I don't have to scratch my head every time?

Andrew