MFC: 1.19
MFC: 1.19

Update usage & SYNOPSIS and clarify that input files are not removed.
Sort getopt option handling of -p too, while here.

The changes are adapted from a patch by Ruslan Ermilov, posted as
followup to docs/33852.

PR:             docs/33852
Submitted by:   Gary W. Swearingen <swear@blarg.net>

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