Split-off of pecl_http's persistent handle and resource factory API

Current version

php54-raphf requires the following formula to be installed:
autoconf 2.69 Automatic configure script builder

Recent formula history

Jan Viljanen php54-raphf 1.1.2
Andreas Braun Add description for raphf formula
Andy Blyler cleanup extension testing
Andy Blyler Update URLs to use HTTPS
Xu Cheng remove root_url in bottle block

Formula code at GitHub