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/patches/004-fix-scoreboard-location.patch

@@ -0,0 +1,11 @@
+--- a/include/scoreboard.h
++++ b/include/scoreboard.h
+@@ -40,7 +40,7 @@ extern "C" {
+ 
+ /* Scoreboard file, if there is one */
+ #ifndef DEFAULT_SCOREBOARD
+-#define DEFAULT_SCOREBOARD "logs/apache_runtime_status"
++#define DEFAULT_SCOREBOARD "log/apache2/apache_runtime_status"
+ #endif
+ 
+ /* Scoreboard info on a process is, for now, kept very brief ---