Fixes #3373 - Fix typo: 'unknow' instead of 'unknown'
Merge pull request #226 from nperron/bug_3373/dev/fix_typo_about_unknow_instead_of_unknown

Fixes #3373 - Fix typo: 'unknow' instead of 'unknown'
Merge branch 'branches/rudder/2.3' into branches/rudder/2.4

Conflicts:
	rudder-core/src/main/scala/com/normation/rudder/repository/ldap/LDAPNodeConfigurationMapper.scala