Fix memory leak in syslog input. (tcp server)

Remove the client from the clients list when the connection is closed.
since the plugin's name changed to collate, update the comments and method name, vars to collate, to keep consistent
Update libs and dep versions to use cabin >= 0.6.0 and avoid conflicting
0.5 and 0.6 installs. (LOGSTASH-1497)

This was observed as a result of ugprading to jruby 1.7.5 (thus
upgrading rubygems). I believe the order of operations in dependency
resolution was changed to trigger this. Basically, ftw wants cabin>0,
logstash wanted cabin=0.5.0, and if ftw is satisfied first then
logstash's dep fails.
Merge pull request #735 from logstash/fix-cabin-deps

Update libs and dep versions to use cabin >= 0.6.0 and avoid conflicting
Merge pull request #704 from bernd/fix-syslog-input-memleak

Fix memory leak in syslog input. (tcp server)
validate the text encoding and replace the text with a String#inspect
value if it is not valid.

This is the first of what will likely be an endless road of trying to
best solve the "My data is not in UTF-8 and I have no idea what to do
next!" problem that continues to plague logstash users.

The new behavior is that invalidly-encoded text will be replaced with a
String#inspect value which should help identify the original text
through an escape sequence and feels better than using ruby's encoding
replace-character support (which loses the data during conversion)

LOGSTASH-1443
Merge pull request #728 from fbird/master

since the plugin's name changed to collate, update the comments and meth...
- update changelog through 1476322c4ab18e41c0c93e27a3f5aa2c6e6813f8
Merge pull request #737 from logstash/utf8-gonna-make-me-quit-computers

validate the text encoding and replace the text with a String#inspect
Get the date correct in syslog output based on the RFC chosen. This is an alternate fix for #692
- typo fixing
Merge pull request #739 from logstash/fix-syslog-output

Get the date correct in syslog output based on the RFC chosen. This is a...
prep for release
- update changelog
Update for release
update changelog for release
- dev bump
Add source and target options to the DNS filter

  * Deprecate resolve, reverse and action options