add Korenix JetNetJet MIB

git-svn-id: http://observium.org/svn/observer/trunk@4317 61d68cd4-352d-0410-923a-c4978735b2b8
move sysObjectID-based OS detection into definitions instead of separate include files

git-svn-id: http://observium.org/svn/observer/trunk@4318 61d68cd4-352d-0410-923a-c4978735b2b8