Reference github issues now.

Hosted Jira (logstash.jira.com) is currently busted because we have
exceeded the maximum number of users that platform can accomodate
(according to Atlassian support). Until that is resolved, let's point
everyone at github issues instead.

closes #1508
fix connection threads tracking leak

better mutex name, loop with while true

event per connection & thread cleanups specs

remove leftover

closes #1509
logstash boot sequence cleanup & drip support fix
deprecated USE_JRUBY environment var
added USE_RUBY and USE_DRIP environment vars
centralized gem path handling in LogStash::Environment

use consistent discovery strategy
Add tests to cover codec autoswitch for stdin + tcp inputs

json->json_lines & plain->line

Tests for #1392
Closes #1394
inputs/base: Copy the codec's charset when switching.

Includes tests
use bundler compatible ruby version string
Ignore RubyMine/IntelliJ dirs
consolidate java grok patterns
Merge branch 'pr/1518'
Update to reflect new JRuby default and USE_RUBY env option
Fixes spelling in en.yml

Closes #1544
Fix a missing coma in doc for remove_field

Closes #1490
Use the newer { "fieldname" => "pattern" } for grok filters.

Replace the older grok style:

    { match => [ "fieldname", "pattern" ] }

With the newer one:

    { match => { "fieldname" => "pattern" } }

Also see https://github.com/elasticsearch/logstash/issues/1499
for more examples.

Closes #1516
Evaluate dynamic fields in event when used with gsub

Closes #1529
Add tests for issue to reproduce behavior

Fix break_on_match issue while evaluating multiple patterns

Closes #1547

Make better exception message

Add more specs for inputs with arrays

Closes #1547
Add tests for issue to reproduce behavior

Fix break_on_match issue while evaluating multiple patterns

Closes #1547

Make better exception message

Add more specs for inputs with arrays

Closes #1547
call vendor-geoip instead of $(GEOIP) in prepare-tarball
Closes #1563
Merge remote-tracking branch 'upstream/master'
Merge pull request #1532 from colinsurprenant/fix/gem_path

use bundler compatible ruby version string
Update ES version docs

ES version 1.0 or greater is now supported by all protocols.

The Elasticsearch eng team has tests to ensure client nodes from all ES versions >=1.0 work with all ES clusters version >=1.0