Update NEWS/UPGRADING with openssl additions
Fix build against older OpenSSL libs
More openssl UPGRADING updates
fix linkage

"extern inline" looks like tricky case for portability, but extern
is required with VS. So reduce the case to a starndard one to avoid
unporbatibily.
Merge branch 'PHP-5.6'

* PHP-5.6:
  fix linkage
  More openssl UPGRADING updates
  Fix build against older OpenSSL libs
  Update NEWS/UPGRADING with openssl additions