Add new "--p4-passwd" command line option
Add new "--p4-passwd" command line option

Adds the "--p4-passwd" command line option to allow a user to supply the
Perforce Ticket or clear-text password.  This is useful in cases where the
Perforce password/ticket is not available in the environment when the command
is run (such as, when this command is part of an automated script).

Reviewed at http://reviews.reviewboard.org/r/1766/

halvorlu/rbtools,beol/rbtools,clach04/rbtools_0.4.1,davidt/rbtools,bcelary/rbtools,1tush/rbtools,halvorlu/rbtools,Khan/rbtools,clach04/old_rbtools_0.3.2,clach04/rbtools,halvorlu/rbtools,haosdent/rbtools,reviewboard/rbtools,haosdent/rbtools,reviewboard/rbtools,datjwu/rbtools,reviewboard/rbtools,davidt/rbtools,davidt/rbtools,haosdent/rbtools,beol/rbtools,datjwu/rbtools,beol/rbtools,datjwu/rbtools,Khan/rbtools