Praefect: support of TLS
In order to support implementation of gitaly#1698 (closed) it is required to include all the necessary changes into omnibus.
It looks really similar to what was done in !2858 (merged) to enable TLS support in Gitaly.
The names of the configuration parameters are the same with the same structure, please see gitaly!2276 (merged).
/cc @zj-gitlab @jramsay
Edited by Pavlo Strokov