gerrit: integrate with b.hackerspace.pl

Already deployed on prod. Example: b/1337

Change-Id: Ia1bd038a0fc65ad9ddba74e515c113b5421bdfff
diff --git a/devtools/gerrit/kube/gerrit.libsonnet b/devtools/gerrit/kube/gerrit.libsonnet
index bebb3cf..00272a1 100644
--- a/devtools/gerrit/kube/gerrit.libsonnet
+++ b/devtools/gerrit/kube/gerrit.libsonnet
@@ -71,6 +71,11 @@
                     basePath  = git
                     canonicalWebUrl = https://%(domain)s/
                     serverId = %(identity)s
+                    reportBugUrl = https://b.hackerspace.pl/new
+
+                [commentlink "b"]
+                    match = [Bb]/(\\d+)
+                    link = https://b.hackerspace.pl/$1
 
                 [sshd]
                     advertisedAddress  = %(domain)s