Apache HTTP Server（简称Apache）是Apache软件基金会的一个开放源码的网页服务器，可以在大多数计算机操作系统中运行，由于其跨平台和安全性被广泛使用，是最流行的Web服务器端软件之一。它快速、可靠并且可通过简单的API扩充，将Perl／Python等解释器编译到服务器中。
Changes with Apache 2.3.4
*) Replace AcceptMutex, LockFile, RewriteLock, SSLMutex, SSLStaplingMutex,
and WatchdogMutexPath with a single Mutex directive. Add APIs to
simplify setup and user customization of APR proc and global mutexes.
(See util_mutex.h.) Build-time setting DEFAULT_LOCKFILE is no longer
respected; set DEFAULT_REL_RUNTIMEDIR instead. [Jeff Trawick]
*) http_core: KeepAlive no longer accepts other than On|Off.
[Takashi Sato]
*) mod_dav: Remove errno from dav_error interface. Calls to dav_new_error()
and dav_new_error_tag() must be adjusted to add an apr_status_t parameter.
[Jeff Trawick]
*) mod_authnz_ldap: Add AuthLDAPBindAuthoritative to allow Authentication to
try other providers in the case of an LDAP bind failure.
PR 46608 [Justin Erenkrantz, Joe Schaefer, Tony Stevenson]
*) Build: fix --with-module to work as documented
PR 43881 [Gez Saunders gez.saunders virgin.net]
