[patch] Update mandoc to 1.14.3
This patch updates mandoc to latest version 1.14.3. However, it's my first contribution to any project and I'd like to ask you for feedback. I've tested building and installing it on the latest snapshot and it seems to work. If you approve this, I'll happily send another diff mapping functions from all man.3 pages by MLINKS, and other tweaks.
I see, I wasn't sure whether those were generated automatically. Well, there are new man.3 pages now, e.g. mandoc_escape.3, mandoc_malloc.3, etc. So I wanted to write a script to automatically generate MLINKS for them. Or just ask around if there's already a tool for that.