Configurable via ctrl/sbbs.ini file JavaScriptLoadPath key value
(comma-separate listed of search directories), default value is "load".
This list is exposed in the JS object model via the js.load_path_list array
(may be modified by scripts).
For JSexec, the default load path list may be over-ridden with the '-i' option.
For relative load paths (e.g. not beginning with '/' or '\'), the path is
assumed to be a sub-directory of the (configurable) mods or exec directories
and is searched accordingly.
So, by default, load("somefile.js") will search in this order:
mods/load/somefile.js
exec/load/somefile.js
mods/somefile.js
exec/somefile.js

-- Fixes bug reported by Jon Justvig (Thanks!)

with IE8.

previously missing and probably explains why some CGI programs (e.g. upload,
IRC) didn't work on Windows. This has not been tested, so feedback is welcome.

buffer.

enabled in SCFG.

Remotely cancelled uploads are unsuccesful transfers.

* ZNAK's do not include a file position (according to ZMODEM.DOC).
* ZRINIT's received between files are now parsed for options.
* When finishing a session by sending ZFIN and no ZFIN is received in response,
  up to 10 (by default) ZABORTs and ZFINs are sent alternately.
* If a ZRPOS is received in response to a sent ZEOF, continue the transfer.
* If first file in batch is unsuccessfully sent, stop the batch.

Added prompts for sub-board operators/sysops, after reading an unvalidated
moderated messages to validate or delete the message.

if savemsg() call failed, SMB status was not saved in msgbase.status prop.
if savemsg() call failed, the recipient list array, if supplied, was still
parsed and headers created (!).
if the recipient list parsing fails, the msgbase.error string may not have been
set, now it'll be set to "Recipient list parsing failure" (if not SMB error).

* First subpacket of every frame now uses ZCRCW,  this adheres to the following
   "should" from ZMODEM.DOC:
  The next transmitted data frame [after a ZRPOS] should be a ZCRCW frame
  followed by a wait to guarantee complete flushing of the network's memory.

* Added support for the following ZMODEM.DOC requirement:
  FULL STREAMING WITH SAMPLING
  If one of these characters [CAN or ZPAD] is seen, an empty ZCRCE data
  subpacket is sent.
  This is now true, but for ZPAD chars (e.g. ZRPOS header) only.

* Implement an attempt counter in the ZFILE header re-transmit scheme
  (previously, would retry indefinitely until locally or remotely cancelled)

* Better support for receiving a ZSKIP header mid-file transfer.

* Better support for receiving a ZRPOS to end-of-file during a file transfer
  (ala HyperTerminal).

* New and updated log output.

characters.

file) case-insensitively.

change in rev 1.507 (Dec-20-2008):
sbbs->event_thread_running was being set to false *before* js_cleanup() was
being called, so it was possible for the js_cleanup() in the sbbs_t destructor
to be called simultaneously with the js_cleanup() at the end of the
event_thread causing mayhem.