add option for multi_accept and events_use

[saz]

No description provided.

[saz]

This should fix #312 and #313

[jfryman]

Awesome. Thanks!

[hundredacres]

Getting an error related to this param -

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: false is not a string. It          looks to be a FalseClass at /etc/puppet/modules/nginx/manifests/init.pp:92 on node syslog01.corp.sharpcast.com
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run

Line 92 of init.pp -

validate_string($events_use)

Line in params.pp -

$nx_events_use                     = false

[saz]

Sorry, I've missed this. #329 should resolve this issue