Use numeric timestamp in icinga2 ca list --json

[gunnarbeutner]

[dnsmichi]

Note: We cannot use ASN1_TIME_diff. This only is available since OpenSSL 1.0.2.

[Crunsher]

Parsing ASN1_TIME is HELL. OpenSSL 1.0.1 may not be supported anymore but this does not mean we can just assume Version 1.0.2.

I'd say we keep it as a string for now and try again when Trusty dies.

[dnsmichi]

That also affects RHEL* and SLES.

[dnsmichi]

SLES11 and Ubuntu 14 are gone. OpenSSL 1.0.1 is EOL since a while too.

Showstoppers

CentOS/RHEL 6.

Name        : openssl
Arch        : i686
Version     : 1.0.1e
Release     : 57.el6

Debian Jessie LTS.

Package: openssl
Versions:
1.0.1t-1+deb8u11