K 10 svn:author V 8 hselasky K 8 svn:date V 27 2015-03-25T08:55:34.232465Z K 7 svn:log V 601 Implement a simple OID number garbage collector. Given the increasing number of dynamically created and destroyed SYSCTLs during runtime it is very likely that the current new OID number limit of 0x7fffffff can be reached. Especially if dynamic OID creation and destruction results from automatic tests. Additional changes: - Optimize the typical use case by decrementing the next automatic OID sequence number instead of incrementing it. This saves searching time when inserting new OIDs into a fresh parent OID node. - Add simple check for duplicate non-automatic OID numbers. MFC after: 1 week END