Merge branch 'master' of git.php.net:/pecl/http/pecl_http

* 'master' of git.php.net:/pecl/http/pecl_http: (76 commits)
  BFN
  prepare R_2_1_0_RC1
  fix libevent version
  ensure string and custom options are reset properly
  rm unused constant
  upgrade curl stuff
  CURLOPT_XFERINFO{FUNCTION,DATA}
  CURLINFO_TLS_SESSION
  update
  ssl lib config fixes
  error out on missing pecl dependencies
  alloca
  save funccall
  abuse zend_ptr_stack
  abuse zend_ptr_stack for better performance
  save a funccall
  get rid of slow sscanf
  improve message parsing performance by about 25%
  back to dev
  fix xml
  ...
set always_populate_raw_post_data=-1 to avoid failed test (because of warning)
slip online test