Merge branch 'stable-2.9' into stable-2.10
* stable-2.9:
Fix SubmoduleOp tests
Fix quoted-printable encoding of e-mail addresses
Fix incorrect submodule subscriptions
Remove 'send email' checkbox from reply box on change screen
Update system group documentation
Consider rule action while constructing local owners list
Increase the size of HTTP passwords
Do not throw away random bytes from the CSPRNG
Conflicts:
gerrit-server/src/main/java/com/google/gerrit/server/git/ReceiveCommits.java
gerrit-server/src/main/java/com/google/gerrit/server/git/SubmoduleOp.java
gerrit-server/src/test/java/com/google/gerrit/server/git/SubmoduleOpTest.java
Change-Id: If086a9021aabb512023753d8dea59f50799cd91a
