facebook/hiphop-php — pull request #446 by ftzdomino (2011-12-15 17:47:01+00:00)
Title: Support for curl-7.21.7 and possibly newer 

Curl 7.21.3 through 7.21.7 and possibly newer versions require this modification to the patch file. 7.21.3 or newer is needed to compile with newer versions of libssh2. 7.21.2 and earlier die with "ssh.c:121:8: error: conflicting types for ‘libssh2_free’" because the symbol is defined twice.