feature: when using LdapUserService one can configure Gitblit to fetch all users from ldap that can possibly login. This allows to see newly generated LDAP users instantly in Gitblit. By now an LDAP user had to log in once to appear in GitBlit.

feature: when LDAP user synchronization is enabled, one can configure GitBlit to delete all LDAP users from the backing user service that are no longer existent in LDAP. By now LDAP users that were deleted still appeared in the GitBlit user list.
significantly reduce write operations to backing user system.
Merge branch 'master' of https://github.com/gitblit/gitblit into enhancedLdap

Conflicts:
	distrib/gitblit.properties
cache results of LDAP user synchronization for a configurable amount of time (realm.ldap.ldapCachePeriod = 2 MINUTES)
Translation to Brazilian Portuguese
FIX: setting line separator back to Windows style
Update from upstream/master

Merge remote-tracking branch 'upstream/master' into translation_to_pt-br
Some language adaptions on pt-br properties
translation of lastest properties
Merge remote-tracking branch 'upstream/master' into translation_to_pt-br
Add more translation to Korean
Removed DoubleCheckedLocking from checkstyle.xml.
Since Checkstyle 5.6 it's no longer supported (see http://checkstyle.sourceforge.net/releasenotes.html)
Merge branch 'master' of https://github.com/kwoot/gitblit
Merge branch 'checkstyleDoubleCheckedLocking' of https://github.com/mystygage/gitblit
Updated documentation
Completed Dutch translation
Support local accounts with LdapUserService and RedmineUserService (issue-183)
Draft mechanism to record a push log as a hidden orphan branch
Removed unused and untested native hook code
Fixed NPE on create repo with mixed case (issue-185)