wget 1.16.1

This version bump also brings the --disable-pcre flag, and this commit makes that flag take effect unless you pass --with-pcre to the brew install.  Pcre is not a requirement, but wget opportunistically (and silently) links to it if it's on your machine, which can make for nasty surprises later.
OK, I'll fix these.  I was just following the in-formula precedent of iri, but now I see why the pcre case should be handled in the way you say.

It's been a while since I've had to tweak an already-submitted PR.  After I tweak and commit locally, I'm supposed to do some further thing locally before I push to my github repo, right?  Is it "squashing"?