Fix bug in json output in host availability report
Merge remote-tracking branch 'origin/mluebben/fixes' into rbartels/cgi
classic-ui: fixed JSON output is insufficiently escaped #3541

refs: #3541

now blackslash gets escaped and all control characters get sripped.
classic-ui: segfault when reading malformed log entries #3528

refs: #3528

now we check if temp_buffer is actually filled before we pass it
on to strstr.
icinga.spec: fix Source0 url
icinga.spec: import 1.8.x changelog, keeping history
Merge branch 'test/cgis' into next