will use to set the global property, exit_code, used by jsexec and bbs.exec()
for numeric return codes.

is provided.

JS_BranchCallback behavior in regards to infinite-loop detection, periodic
garbage collection, and periodic time-slice yields.
Eliminated global reset_loop() method, ill side-effects. Use branch.limit=0
instead to defeat infinite-loop detection mechanism (e.g. for static services).

Baja inkey and inchar functions now use an inkey timeout of 1ms.

external(), js_execfile(), and errormsg().

module (.js or .bin) files.

100 calls (JAVASCRIPT_GC_FREQUENCY). This fixes the problem of every
created object living in memory during the life of a script.

an infinite loop is detected.
js_execfile() now resets loop counter before executing scripts.

and other potential multi-threaded issues.

operations, socket and FTP functions.

Each function that requires a temp string variable, now has its own "tmp" local variable.