MFC r324862:Clean up trailing whitespace in kdb_thr_ctx(..)
MFC r263710, r273377, r273378, r273423 and r273455:- De-vnet hash sizes and hash masks.- Fix multiple issues related to arguments passed to SYSCTL macros.Sponsored by: Mellanox Technologies
MFC r257214:Inform about the kdb re-entry.Approved by: re (gjb)