r8316: give full access to the popt command line parsing in ejs scripts, including

access to the samba common options. For example:

ok = GetOptions(ARGV, options,
		"POPT_AUTOHELP",
		"POPT_COMMON_SAMBA",
		"myopt=s",
		"intopt=i",
		"noopt");

this allows scripts to support their own extended options properly

source/scripting/ejs/mprutil.c

@@ -108,6 +108,9 @@ struct MprVar mprList(const char *name, const char **list)
 	for (i=0;list && list[i];i++) {
 		mprAddArray(&var, i, mprCreateStringVar(list[i], 1));
 	}
+	if (i==0) {
+		mprSetVar(&var, "length", mprCreateIntegerVar(i));
+	}
 	return var;
 }