K 10 svn:author V 7 rwatson K 8 svn:date V 27 2015-01-06T14:32:28.416020Z K 7 svn:log V 193 Use M_WRITABLE() and M_LEADINGSPACE() rather than checking M_EXT and doing hand-crafted length calculations in the IP options code. Reviewed by: bz Sponsored by: EMC / Isilon Storage Division END