+- /usr/local/share/doc/ngircd/: documentation
+
+
+III. Additional features
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+The following optional features can be compiled into the daemon by passing
+options to the "configure" script. Most options can handle a <path> argument
+which will be used to search for the required libraries and header files in
+the given paths ("<path>/lib/...", "<path>/include/...") in addition to the
+standard locations.
+
+* Syslog Logging (autodetected by default):
+ --with-syslog[=<path>] / --without-syslog
+
+ Enable (disable) support for logging to "syslog", which should be
+ available on most modern UNIX-like operating systems by default.
+
+* ZLib Compression (autodetected by default):
+ --with-zlib[=<path>] / --without-zlib
+
+ Enable (disable) support for compressed server-server links.
+ The Z compression library ("libz") is required for this option.
+
+* IO Backend (autodetected by default):
+ --with-epoll[=<path>] / --without-epoll
+ --with-kqueue[=<path>] / --without-kqueue
+
+ ngIRCd can use three different IO "backends": the "old school" select()
+ API which should be supported by most UNIX-like operating systems, or the
+ more efficient and flexible epoll() (Linux 2.6) or kqueue() (BSD) APIs.
+ By default the IO backend is autodetected, but you can use "--without-xxx"
+ to disable a more enhanced API and force the daemon to use select().
+
+* IDENT-Support:
+ --with-ident[=<path>]
+
+ Include support for IDENT ("AUTH") lookups. The "ident" library is
+ required for this option.
+
+* ZeroConf Support:
+ --with-zeroconf[=<path>]
+
+ Compile ngIRCd with support for ZeroConf multicast DNS service registration.
+ Either the Apple ZeroConf implementation (e. g. Mac OS X) or the Howl
+ library is required. Which one is available is autodetected.
+
+* TCP-Wrappers:
+ --with-tcp-wrappers[=<path>]
+
+ Include support for Wietse Venemas "TCP Wrappers" to limit client access
+ to the daemon, for example by using "/etc/hosts.{allow|deny}".
+ The "libwrap" is required for this option.