[backend] ignore exit events on initial scheduler startup
[dist] mention the possible broken ruby packaging
[dist] better hint for fixing ruby setup
[api] do not crash on owner search with explicit disabled role filter
[backend] allow partitioning without multiple reposervers, make /published work with partition
[api] avoid validation of all uploaded source files to avoid OOM errors.

Some file names still get validated in that function
[backend] fix typo in fill_remote_getrev_cache in bs_srcserver
[dist] solved ruby problems in the ruby packages ...
[dist] initial 2.5 release notes file
[backend] One more endless rebuild case

Some ppc jobs were dispatched on armv7l, which caused
the interesting error message

run-init: /.build/build: Exec format error

Handle that one as well. And simplify the regexps, which
avoids another bug.
[backend] transmit repositories in sibling remotemaps
[backend] support partitioning in workerstatus
[backend] use solv file for repodata transport from siblings
[backend] send sibling when the reposerver does getprojpack requests
[backend] repair commit 1ac8ec67cb377554fcf0bd64206a24bb60eac5b0
[dist] start obssigner after creating keys in appliance
[backend] also fill remotemap for aggregates, otherwise partitioned aggregates do not work
[backend] bs_admin: support selection argument
[backend] also store/retrieve remoteprojs in scheduler state
[backend] don't filter out remote projects when checking for the correct sibling