SpiderMonkey was updated to mozjs24. If you want to build elinks
with ecmascript support, you must compile using g++ with -fpermissive .
There is a lot of warnings.
There are some memleaks in ecmascript code, especially related to JSAutoCompartment.
I don't know yet, where and how to free it.
Debian does not support mozjs24, so I'm going to gradually update SpiderMonkey version.
In almost all calls to parse_header, the second argument is a string
literal: parse_header(head, "Charset", NULL) for example.
Of course, parse_header does not write to that string. Accordingly,
make the parameter point to const, so calls that use a variable rather
than a string literal can make that variable point to const too.
Leaving the other parameters non-const for now.
Its return value is now an enum that lets callers know whether an
error occurred. However, this commit changes the callers only
minimally, so they do not yet check the return value.
