With some small fixups along the way

Test: Boot bullhead
Test: init unit tests
Change-Id: I7beaa473cfa9397f845f810557d1631b4a462d6a

Previously init_parser.cpp was made generic and capable of parsing any
number of differently named 'sections' or prefixed lines.  We now use
these capabilities to do the parsing for ueventd.

Bug: 36250207
Bug: 33785894

Test: boot bullhead and ensure the right /dev nodes exist
      with the right permissions set
Test: verify no boot time difference
Change-Id: I698ca962d414f8135af32f6c9cd778841b2b8b53

Remove includes of "log.h" that really want <android-base/logging.h>
Fix header include order
Remove headers included in .cpp files that their associated .h already includes
Remove some unused headers

Test: boot bullhead
Change-Id: I2b415adfe86a5c8bbe4fb1ebc53c7b0ee2253824

This is just the minimal change to keep it building.

Change-Id: I245c5b8413a1db114576c81462eb5737f5ffcef2

By default ueventd creates device nodes under /dev based on the ueventd
DEVPATH.  Several subsystems have special rules which are hardcoded in
devices.c.  Moving forward these special rules should go in ueventd.rc.

Special rules have the syntax:

	subsystem <s>
		devname (uevent_devname|uevent_devpath)
		[dirname <dir>]

Devices matching SUBSYSTEM=<s> will be populated under <dir>.  dirname
is optional and defaults to /dev.  If dirname is provided, <dir> must
start with "/".

If devname is uevent_devname, ueventd will create the device node as
<dir>/DEVNAME.  DEVNAME may include intermediate subdirectories, which
ueventd will automatically create.

If devname is uevent_devpath, ueventd will use the legacy behavior of
computing DEVPATH_BASE=basepath(DEVPATH), and creating the device node
as <dir>/DEVPATH_BASE.

The new parsing code is based on init_parser.c, with small tweaks to
handle commands which don't fall under a section header.

Change-Id: I3bd1b59d7e62dfc9d289cf6ae889e237fb5bd7c5
Signed-off-by: Greg Hackmann <ghackmann@google.com>

Change-Id: Iea6c56013062ade633a1754f7bcf8cf09b3dedc1