Log Message:
Update to 0.11.4rc1.  No changelog available; if interested, please
see GIT history.

Made option elinks-fastmem the default, as it's significantly faster
and I don't trust their wrappers of malloc(), etc. al. anyway.
Version 0.12 supports boehm-gc, which will probably become the default.
If 0.12 isn't released fairly soon, I'll see about backporting support.
Also add elinks-html-highlight as a default, as there's really no
reason not to.