nmap: use Homebrew's openssl
wget: use Homebrew's openssl
nginx: use Homebrew's openssl
nginx: look for pcre in a more specific location
gdk-pixbuf 2.30.3
HEVEA 2.12

Closes #26085.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
gpac: fix build against current ffmpeg releases
ffmpeg 2.1.3 --devel