mathopd-1.5p4 released

Hi. I just put mathopd-1.5p4 on www.mathopd.org.

There is a slight error in the current mathopd-1.5 release: if
you have something like

 Control {
   Alias /
   Location /var/www
 }
 Control {
   Alias /~
   Location public_html
   UserDirectory On
 }

then a request for a nonexting user's page, say

 /~nosuchuser

will return a 500, rather than a 404 error. In 1.5p4 mathopd will
ignore the control block with UserDirectory and try to open
/var/www/~nosuchuser, which in most cases would return in a 404
error.

Thanks to Janusz Gumkowski for pointing out the problem and trying
out my workaround.

Cheers
Michiel