The headers were pointing to the old github wiki. Since we've officially
moved to Confluence, these links should be updated.

Changes were originally introduced in 2c53e32c, PR #2217

Changes were originally introduced in 02cda120, PR #2214

This reverts commit 02cda120, reversing
changes made to e4848f95.

Reason: changes were added to mongo role, not mongo_3_0

This reverts commit 2c53e32c, reversing
changes made to f376391b.

Reason: changes were added to mongo role instead of mongo_3_0

This doesn’t need to be a directory, it can be just a file (globing also
works).
See http://docs.splunk.com/Documentation/Storm/Storm/User/Editinputsconf

When downloading the deb from splunk’s website, it doesn’t have that
format.
See: http://www.splunk.com/download/universalforwarder

When 'splunk' group doesn’t exist yet, ansible fails when creating the
user. Leaving it empty will create the group anyway.

prefix