debug - Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Backtraces
nginx_modules_http_addition - Add support for adding contents of other locations before and after the current location's content
nginx_modules_http_auth_basic - Add support for limiting access to a location by validating the username and password using the HTTP Basic Authentication
nginx_modules_http_charset - Add support for adding the specified charset to the "Content-Type" response header field and reencoding singe-byte charsets
nginx_modules_http_dav - Add support for the WebDAV functionality and methods: PUT, DELETE, MKCOL, COPY and MOVE
nginx_modules_http_dav_ext - Add support for the additional WebDAV methods into the existing WebDAV module: PROPFIND & OPTIONS
nginx_modules_http_degradation - Add support for returning 204 or 444 code for some locations on low memory condition (reliable on FreeBSD only)
nginx_modules_http_echo - Add support for shell-style goodies in the NGINX configuration file
nginx_modules_http_flv - Add support for the server-side pseudo-streaming of Flash Video (FLV) files
nginx_modules_http_geo - Add support for creating variables whose values depend on the client IP-address
nginx_modules_http_geoip - Add support for creating variables whose values depend on the client IP-address, using the precompiled MaxMind databases
nginx_modules_http_geoip2 - Add support for creating variables whose values depend on the client IP-address, using the precompiled MaxMind GeoIP2 databases
nginx_modules_http_gunzip - Add support for decompressing responses with "Content-Encoding: gzip" for clients that do not support "gzip" encoding method
nginx_modules_http_javascript - Add support for implementing location and variable handlers in njs - a subset of the JavaScript language
nginx_modules_http_limit_conn - Add support for limiting the number of connections per a defined key, e.g. the number of connections from a single IP address
nginx_modules_http_limit_req - Add support for limiting the request processing rate per a defined key, e.g. the processing rate of requests coming from a single IP address
nginx_modules_http_map - Add support for creating variables whose values depend on values of other variables
nginx_modules_http_memc - Add support for an extended version of the standard memcached module that supports set, add, delete, and many more memcached commands
nginx_modules_http_push_stream - Add support for the stream HTTP push module, which supports EventSource, WebSocket, Long Polling, and Forever Iframe
nginx_modules_http_random_index - Add support for processing requests ending with the slash character ('/') by picking a random file in a directory to serve as an index file
nginx_modules_http_realip - Add support for setting the client address and optional port to those sent in the specified header field (e.g. "X-Real-IP" or "X-Forwarded-For")
nginx_modules_http_referer - Add support for blocking access to a site for requests with invalid values in the "Referer" header field
nginx_modules_http_rewrite - Add support for changing the request URI using PCRE regular expressions, returning redirects, and conditionally selecting configurations
nginx_modules_http_secure_link - Add support for checking authenticity of requested links, protecting resources from unauthorized access, and limiting link lifetime
nginx_modules_http_security - Add support for modsecurity: web application firewall and intrusion detection system
nginx_modules_http_slice - Add support for spliting a request into subrequests, each returning a certain range of response
nginx_modules_http_sub - Add support for modifying a response by replacing one specified string by another
nginx_modules_http_upload_progress - Add support for an upload progress system, that monitors RFC1867 POST uploads as they are transmitted to upstream servers
nginx_modules_http_upstream_zone - Add support for defining a shared memory zone that keeps the group's configuration and run-time state that are shared between worker processes
nginx_modules_stream_geo - Add support for creating variables whose values depend on the client IP-address
nginx_modules_stream_geoip - Add support for creating variables whose values depend on the client IP-address, using the precompiled MaxMind databases
nginx_modules_stream_geoip2 - Add support for creating variables whose values depend on the client IP-address, using the precompiled MaxMind GeoIP2 databases
nginx_modules_stream_javascript - Add support for implementing location and variable handlers in njs - a subset of the JavaScript language
nginx_modules_stream_limit_conn - Add support for limiting the number of connections per a defined key, e.g. the number of connections from a single IP address
nginx_modules_stream_map - Add support for creating variables whose values depend on the values of other variables
nginx_modules_stream_realip - Add support for setting the client address and optional port to those sent in the specified header field (e.g. "X-Real-IP" or "X-Forwarded-For")
nginx_modules_stream_return - Add support for sending a specified value to the client and then closing the connection
nginx_modules_stream_upstream_zone - Add support for defining a shared memory zone that keeps the group's configuration and run-time state that are shared between worker processes
pcre - Add support for Perl Compatible Regular Expressions
