unmerge-logs *Keep* logs from successful unmerge phases. This is relevant only when PORT_LOGDIR is set. Well, it's in make.globals, didn't change it, ended up with with lots of essentially useless logs in PORT_LOGDIR. I assumed it does the exact oposite of what the manpage suggests, i.e., the logs to be unmerged :P
What should we call it? keep-unmerge-logs? That's a bit long, no? Can't we expect people to read the man page?
When everything else fails, read the manpage... or, was it take a bigger hammer? :) It'd be at least consistent with keeptemp, keepwork... whatever. Makes me think whether this functionality makes a sense as a feature at all, kinda can't find a good use case for this.
