Allow weird characters in usernames if an admin persists on that: a) Convert all the remaining older Perl system() calls to the new,    more secure LIST format so they are robust to whitespace and    shell metacharacters in their arguments. b) Add a new option: -force, which allows adding usernames containing    characters that are otherwise illegal.
Allow weird characters in usernames if an admin persists on that:
a) Convert all the remaining older Perl system() calls to the new,
   more secure LIST format so they are robust to whitespace and
   shell metacharacters in their arguments.
b) Add a new option: -force, which allows adding usernames containing
   characters that are otherwise illegal.

PR:		bin/22860 bin/31049

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