This way there's no need to worry about overwriting another httpd binary
or symlink from another package, for example busyboxes httpd.

The init script is also renamed to apache2 for consistency.

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

Also preinst and postrm are removed. busybox's httpd isn't installed by
default, so these gimmicks seem antiquated.

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

This gets rid of flags. For instance $(FPIC) shouldn't be forced onto
applications (see [1]).

And CONFIGURE_ARGS + CONFIGURE_VARS are broken out of Build/Configure.
This way more arguments can be added easily in the future.

The target is changed from apache to apache2 (which is used by upstream
by default). the CONFIGURE_ARGS are changed where need to enable
modules.

This also renames one patch that fixes scoreboard location (the name
004-pidfile_fix.patch didn't describe what it's doing).

Now with the OpenWrt layout in place 003-logdir_fix.patch can be
removed.

[1] https://wiki.gentoo.org/wiki/Project:Hardened/Position_Independent_Code_internals

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