- Update to 2.1.11 stable
* Fix ABI breakage that had been introduced in 2.1.10. Strictly speaking
this release breaks ABI again to make it compatible with <= 2.1.9.
+ See git commit 18104973 for more details
* evdns: add new options -- so-rcvbuf/so-sndbuf
* various autotools and cmake build changes
* buffer: fix possible NULL dereference in evbuffer_setcb() on ENOMEM
* Warn if forked from the event loop during event_reinit()
* evutil: set the have_checked_interfaces in evutil_check_interfaces()
* https-client: correction error checking