Service provider unable to load private key from file

[Peter Schober]

* Brian Reindel <brian at reindel.com> [2013-09-17 15:55]:
> /var/run/shibboleth
> drwxr-xr-x. 2 root      root      4096 Sep 17 09:41 shibboleth
[...]
> These were created as a part of the installation, so we haven't changed them.

If that were true no SP install could ever work: Without being able to
create the socket in /var/run/shibboleth the software won't start nor
work (and strace would have shown that, as Scott also suggested),
-peter