In particular, do not rely on the $USER environment variable always existing.
tmux for example seems to clear it, causing lots of invalid messages:
"previous known host file not found"

This broke in commit 80fd22dc, but instead of reverting that commit, we now
fall back to expanding just ~ when $USER is not set.

be permissive with BSD with service enabled upper/lower/mixed cases

Signed-off-by: Brian Coca <briancoca+ansible@gmail.com>

su_user_var.  My last PR was only half merged, and when the bug fix for
the su/su_pass typo was merged, the removed line in this commit was
mistakenly reintroduced.

Added ability to create EC2 volume from snapshot

Add skip_tags to ansible-playbook man page

Merge branch 'feat/ec2_start_stop' of git://github.com/Geryon/ansible into Geryon-feat/ec2_start_stop

Fix exception being thrown for new instance registration with ELB

sysctl: parse bool value as 0/1 and refactor a little bit

ec2_group: rules can't reference containing group fix #5309

Fixing traceback caused by incorrect argument passing to json.dumps

Fixes #5756

Added the ability to add EBS volumes to EC2 instances at creation time

Currently if we are trying to register an instance that has not yet
been registered with the elb an exception is thrown.

Fixing *_plugins configuration names and values

Based on reading of Developing Plugins and the example ansible.cfg file, it seems the sections changed here were created in error by a copy and paste.

This allows a volume to be cloned from a snapshot, a brand new
volume to be created, or an ephemeral volumes to be associated
at time of instance creation.

This avoids any race conditions associated with creating extra volumes
after instance creation (e.g. writes happening before the volume is
mounted).

In addition, this allows the root volume to be edited

Minor documentation fixes.

Fixes 5397