wget 1.16.1

This release 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.

Closes #34842.
Closes #34857.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
wget: update 1.16.1 bottle.
Cookbook: Fix the link for squashing-instructions

Closes #34859.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
zlib & sqlite3: pkgconfig support

native pkg-config support for zlib and sqlite to elimate the need
to pass flags to configure or make stages in formulae.
aria2: update 1.18.8_1 bottle.
mkvtoolnix: update 7.3.0 bottle.
pdf2htmlex: update 0.12 bottle.
spdylay: update 1.3.1 bottle.