Update the documentation for setpgrp(2) to reflect the access control checks that the code actually performs.  Judging from the 4.2BSD release notes, the docs have only been out of date for 20 years.
Update the documentation for setpgrp(2) to reflect the access control
checks that the code actually performs.  Judging from the 4.2BSD
release notes, the docs have only been out of date for 20 years.

PR:	29844

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