Unfortunately these changes aren't summarized. The differences are all the 'feature' bullets in the changes webpage from 1.1.0 to 1.2.0. I've assembled these be

Unfortunately these changes aren't summarized. The differences are all the 'feature' bullets in the changes webpage from 1.1.0 to 1.2.0. I've assembled these below: - the $connection_requests variable. - $tcpinfo_rtt, $tcpinfo_rttvar, $tcpinfo_snd_cwnd and $tcpinfo_rcv_space variables. - the "worker_cpu_affinity" directive now works on FreeBSD. - the "xslt_param" and "xslt_string_param" directives. Thanks to Samuel Behan. - the "from" parameter of the "disable_symlinks" directive. - the "return" and "error_page" directives can now be used to return 307 redirections. - the "disable_symlinks" directive. - the "proxy_cookie_domain" and "proxy_cookie_path" directives. - multiple "limit_req" limits may be used simultaneously. - the "TLSv1.1" and "TLSv1.2" parameters of the "ssl_protocols" directive. - the "proxy/fastcgi/scgi/uwsgi_cache_lock", "proxy/fastcgi/scgi/uwsgi_cache_lock_timeout" directives. - the "pcre_jit" directive. - the "if" SSI command supports captures in regular expressions. - the "so_keepalive" parameter of the "listen" directive. Thanks to Vsevolod Stakhov. - the "if_not_empty" parameter of the "fastcgi/scgi/uwsgi_param" directives. - the $https variable. - the "proxy_redirect" directive supports variables in the first parameter. - the "proxy_redirect" directive supports regular expressions. - the "valid" parameter of the "resolver" directive. By default TTL returned by a DNS server is used. - support for multiple "limit_conn" limits on the same level. - the "image_filter_sharpen" directive. - support of several DNS servers in the "resolver" directive. Thanks to Kirill A. Korinskiy. - "proxy/fastcgi/scgi/uwsgi_ignore_headers" directives support the following additional values: X-Accel-Limit-Rate, - decrease of memory consumption if SSL is used. - the "uwsgi_buffering" and "scgi_buffering" directives. Thanks to Peter Smit. - the ngx_http_upstream_keepalive module. - the "proxy_http_version" directive. - the "fastcgi_keep_conn" directive. - the "worker_aio_requests" directive. - the module ngx_http_mp4_module. - the "max_ranges" directive. - now shared zones and caches use POSIX semaphores on Solaris. Thanks to Den Ivanov. - accept filters are now supported on NetBSD. - cache loader run time decrease. - "loader_files", "loader_sleep", and "loader_threshold" options of the "proxy/fastcgi/scgi/uwsgi_cache_path" directives. - loading time decrease of configuration with large number of HTTPS sites. - now nginx supports ECDHE key exchange ciphers. Thanks to Adrian Kotelba. - the "lingering_close" directive. Thanks to Maxim Dounin.