Attempt to further comment and clarify System V IPC logic: document why certain exceptions are made, note an inconsistency between FreeBSD and some other implementations regarding IPC_M, and let suser() generate our EPERM rather than forcing it ourselves. Remove a carriage return that crept in in the last commit.
Attempt to further comment and clarify System V IPC logic: document
why certain exceptions are made, note an inconsistency between
FreeBSD and some other implementations regarding IPC_M, and let
suser() generate our EPERM rather than forcing it ourselves.
Remove a carriage return that crept in in the last commit.

Reviewed by:	gordon
Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase