Increase default JS heap size from 8M to 16M (ala sbbs.ini)

Also remove "JavaScriptContextStack" (no longer used) and other
wrong or obsolete comments.

ctrl/jsexec.ini

-; $Id: jsexec.ini,v 1.1 2020/05/04 22:05:16 rswindell Exp $
-
 ; Configuration file for Synchronet JSexec
 
 ; The following keys are supported in the global/unnamed section as well as
@@ -7,8 +5,7 @@
 ; base filenames (excluding path and file extension, e.g ".js"). Any values
 ; specified here may be over-ridden with jsexec command-line options.
 
-; Highest log level to actually log/print (ignore all higher/less-severe log msgs):
-; This log level may be overridden for each server/service
+; Highest log level to actually log/print (suppress all less-severe log msgs):
 ; Supported log levels in decreasing severity (ala syslog):
 ; Emergency, Alert, Critical, Error, Warning, Notice, Informational, Debugging
 LogLevel = Informational
@@ -21,12 +18,8 @@ PauseOnError = false
 ; Enable the JS debugger
 Debugger = false
 
-; JavaScript values can be specified here *and* in server-specific sections
-; JavaScript values specified in server-specific sections will over-ride the global values
 ; Maximum allocation of memory per JS run-time:
-JavaScriptMaxBytes = 8M
-; Maximum stack size per JS context:
-JavaScriptContextStack = 16K
+JavaScriptMaxBytes = 16M
 ; Maximum number of ticks (100ms) before auto-termination of script:
 JavaScriptTimeLimit = 864000
 ; Garbage Collection interval (in ticks):