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，可以在大多数电脑操作系统中运行，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。

下载地址:

http://www.apache.org/dist/httpd/httpd-2.4.27.tar.gz

Changes with Apache 2.4.27

*) COMPATIBILITY: mod_lua: Remove the undocumented exported 'apr_table'

global variable when using Lua 5.2 or later. This was exported as a

side effect from luaL_register, which is no longer supported as of

Lua 5.2 which deprecates pollution of the global namespace.

[Rainer Jung]

*) COMPATIBILITY: mod_http2: Disable and give warning when using Prefork.

The server will continue to run, but HTTP/2 will no longer be negotiated.

[Stefan Eissing]

*) COMPATIBILITY: mod_proxy_fcgi: Revert to 2.4.20 FCGI behavior for the

default ProxyFCGIBackendType, fixing a regression with PHP-FPM. PR 61202.

[Jacob Champion, Jim Jagielski]

*) mod_lua: Improve compatibility with Lua 5.1, 5.2 and 5.3.

PR58188, PR60831, PR61245. [Rainer Jung]

*) mod_http2: Simplify ready queue, less memory and better performance. Update

mod_http2 version to 1.10.7. [Stefan Eissing]

*) Allow single-char field names inadvertently disallowed in 2.4.25.

PR 61220. [Yann Ylavic]

*) htpasswd / htdigest: Do not apply the strict permissions of the temporary

passwd file to a possibly existing passwd file. PR 61240. [Ruediger Pluem]

*) core: Avoid duplicate HEAD in Allow header.

This is a regression in 2.4.24 (unreleased), 2.4.25 and 2.4.26.

PR 61207. [Christophe Jaillet]