OpenSSL error on loading metadata certificate in shibd 3.0.2

[Peter Schober]

* Rainer Hoerbe <rainer at hoerbe.at> [2018-11-07 12:09]:
> Shibd cannot load the certificate on startup:
> 
> 2018-11-07 10:35:13 INFO XMLTooling.SecurityHelper : loading certificate(s) from file (/etc/shibboleth/metadata_crt.pem)
> 2018-11-07 10:35:13 ERROR OpenSSL : error code: 33558530 in bss_file.c, line 402
> 2018-11-07 10:35:13 ERROR OpenSSL : error data: fopen('/etc/shibboleth/metadata_crt.pem','r')
> 2018-11-07 10:35:13 ERROR OpenSSL : error code: 537346050 in bss_file.c, line 404

>From a quick look at the archives
http://shibboleth.net/pipermail/users/2015-July/023193.html
it seems OpenSSL would produce the same errror if it couldn't find (or
fopen) that file.

-peter