Post without document is blocking server

See #1, release log:

• 6d7d4f3 by @jpnffigueiredo: Initial version of rultor file
• f3f5ae8 by @jpnffigueiredo: #1 Check for empty document be...
• 78bab31 by @jpnffigueiredo: Add pdd badge
• a4b9db2 by @jpnffigueiredo: Merge branch 'master' of https...
• 65de93a by @jpnffigueiredo: Add pdd file
• 3249ad4 by @jpnffigueiredo: Remove empty xml tags
• 06e0621 by @jpnffigueiredo: Update readme.
• 15d3603 by @jpnffigueiredo: Update artifact id
• b486e9d by @jpnffigueiredo: Update readme.
• c5b5639 by @jpnffigueiredo: Add Aptfile
• e85f50b by @jpnffigueiredo: Initial version.

Released by Rultor 1.67, see build log