MFC revision 1.158:   When using sysinstall on a running system and editing a disk label   fails, suggest setting kern.geom.debugflags to 16.
MFC revision 1.158:
  When using sysinstall on a running system and editing a disk label
  fails, suggest setting kern.geom.debugflags to 16.

PR:		bin/94409

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