Increase the size of the mktemp() filename space by dropping the PID from the encoding and using the character set [a-zA-Z0-9]. This gives a total of 62^6 = 56800235584 possible temporary filenames for the usual default invocation of 6 X's (compared to as few as 52 possibilities for the previous algorithm where up to 5 characters were wasted by the PID).
Increase the size of the mktemp() filename space by dropping the PID from
the encoding and using the character set [a-zA-Z0-9]. This gives a total
of 62^6 = 56800235584 possible temporary filenames for the usual default
invocation of 6 X's (compared to as few as 52 possibilities for the
previous algorithm where up to 5 characters were wasted by the PID).

Update some apparently bitrotten comments to reflect reality.

Audited by:	eivind, freebsd-audit
Reviewed by:	freebsd-current (a while ago)
Originally submitted by:	Peter Jeremy <Peter.Jeremy@alcatel.com.au>

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