Added AuthViaIpCheckBox which allows authentication (for relay) via POP3
or other protocol within the last 60 minutes (this was previously always
enabled if authenticated-relay was allowed, but now that we have real SMTP
AUTH support, this less-secure method is optional).

Created system.lastuser property to get last user record number.
Updated property and method descriptions.
system.secondstr() returns null if no argument specified.

before common global functions).
Updated global method descriptions.

before common global functions).

(skipping deleted or inactive user records).

leaving last_error alias for backwards compatibility.

POP3 server thread reads all msg indices and headers before reporting
initial OK or ERR reponse after authentication.

option must be enabled to allow POP-before-SMTP type authentication.
Finished up support for SMTP AUTH LOGIN support.
Added SMTP AUTH CRAM-MD5 support.
Fixed sockreadline() - returns -1 on error (not 0).

option must be enabled to allow POP-before-SMTP type authentication.

which can be 0.

(used by Outlook Express) only. Still needs work.

for proper point operation.
More judicious use of sizeof() in calls to memset and memcpy.

to get long filenames.

Added more property descriptions (for dynamic JS object model docs).
Fixed a few bugs exposed by jsdocs.js.
Using JS_NewNumberValue for full 32-bit integer support (bitfields mostly).