Fixed the BINGRP handling mess.
Fixed the BINGRP handling mess.

EXEGRP and EXEMODE are used to install DOS (EXE format) binaries.
doscmd(1) can optionally be installed as ``setgid kmem''.
Hence the assignment operator for EXEGRP.

PR:		bin/30538

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