apache: bump to 2.4.41 & sync with master

This is a squash of the following cherry-picked commits:

14f4f0bef0
4e6bdd8a49
c8aba5113b
2d188fd37f
31e0d618e5
39e68309e8
a1472254db
d6476f30bb
258967b0d2
e94a08298e
6bd63d24f0
66bb68a7b6
d44ad09fcd

Short summary:

- version is bumped to 2.4.41
- httpd is renamed to apache2 to avoid overwriting of other servers (for
  instance busybox's httpd)
- the name apache2 is now also used for directories, for instance
  /etc/apache2 instead of /etc/apache
- a simple init script it added (/etc/init.d/apache2)
- a user "apache" is added upon package installation and used by default
- adds the Apache modules (in the main package as well as in additional
  packages)
- Makefile and patches are updated and cleaned
- adds myself as maintainer
- improves the cross-compile setup (via configure variables, patches &
  sed scripts)
- apxs is fixed up so that external modules can be added easily

For more details please check the individual commits provided above.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

net/apache/files/apache2.init

@@ -0,0 +1,20 @@
+#!/bin/sh /etc/rc.common
+
+START=99
+
+reload() {
+	apachectl -k restart
+}
+
+restart() {
+	apachectl -k restart
+}
+
+start() {
+	mkdir -p /var/log/apache2 /var/run/apache2
+	apachectl -k start
+}
+
+stop() {
+	apachectl -k stop
+}

net/apache/files/openwrt.layout

@@ -0,0 +1,24 @@
+
+<Layout OpenWrt>
+    prefix:          /usr
+    exec_prefix:     ${prefix}
+    bindir:          ${prefix}/bin
+    sbindir:         ${prefix}/sbin
+    libdir:          ${prefix}/lib
+    libexecdir:      ${prefix}/lib+
+    mandir:          ${prefix}/share/man
+    sysconfdir:      /etc+
+    datadir:         ${prefix}/share+
+    installbuilddir: ${datadir}/build
+    errordir:        ${datadir}/error
+    iconsdir:        ${datadir}/icons
+    htdocsdir:       ${datadir}/htdocs
+    manualdir:       /usr/share/doc/apache2/manual
+    cgidir:          ${datadir}/cgi-bin
+    includedir:      ${prefix}/include+
+    localstatedir:   /var
+    runtimedir:      ${localstatedir}/run+
+    logfiledir:      ${localstatedir}/log+
+    proxycachedir:   ${localstatedir}/cache/apache2
+</Layout>
+