[SAC] secure (ldap) routing

[Sandro Santilli]

I'm trying to address ticket https://trac.osgeo.org/osgeo/ticket/2521
which is about the "secure" container (ldap.osgeo.org) but I'm lost
in IP routing. According to
https://wiki.osgeo.org/wiki/SAC_Service_Status#Secure_.28LDAP_.29_ldap.osgeo.org
the machine answering requests for "ldap.osgeo.org" is an LXC
container named "secure" and hosted on osgeo7 but the IP address
of "ldap.osgeo.org" (140.211.15.57) is not returned by `ifconfig` run on
`osgeo7` machine. Can anyone help me understand the routing setup ?

--strk;