Add support for checking host against global known host files.
Fixes templating of ansible_ssh_host for delegates
Merge pull request #6213 from sergevanginderachter/fix-delegate-templating

Fixes templating of ansible_ssh_host for delegates.

Tested that this works. Confirmed.
Merge pull request #6156 from iiordanov/devel

Add support for checking host against global known host files.

The effect of this is that before this fix if files are spread across the known_hosts file but not in the ~/known_hosts file the hosts will execute sequentially. This PR augments the functionality so that all of the knowns hosts will execute in parallel.
Synchronize .deb package version with VERSION file
Merge pull request #6266 from drybjed/update_debian_version

Synchronize .deb package version with VERSION file
Add comment about mod_admin_extra

Fixes issue #6027.
Removes pluralization of manager tag attribute.
Merge pull request #6270 from ToBeReplaced/ejabberd_user_doc

Add comment about mod_admin_extra
Merge pull request #6271 from jimkytola/docker-image-fix

Removes pluralization of manager tag attribute.
Micro-optimization of inventory.expand_hosts.detect_range
Micro-optimization: replace s.find(x)!=-1 with x in s

timeit shows a speedup of ~3x on Python 2.7.5 x86_64.
It also makes the code a bit shorter.
hostname module: don't filter hostnamectl with awk

There's no need to filter hostnamectl's output with awk because its man
page says:

    hostnamectl [OPTIONS...] {COMMAND}

       --static, --transient, --pretty
	   If status is used (or no explicit command is given) and one
	   of those fields is given, hostnamectl will print out just
           this selected hostname.

E.g. hostnamectl --static status => ansible.example.org