Virgin import of Flex v2.5.4
import vanilla flex version 2.5.35

Reviewed by:	cognet
Approved by:	cognet
Import flex 2.5.37.
Merge some important post-2.5.37 changes from upstream.

http://flex.git.sourceforge.net/git/gitweb.cgi?p=flex/flex;a=commit;h=c53fd2db8c78fef5afd284c3e64da51bc71cf6c3
http://flex.git.sourceforge.net/git/gitweb.cgi?p=flex/flex;a=commit;h=899b2163bbde1a70b3be8b91cbbabd8007341205
http://flex.git.sourceforge.net/git/gitweb.cgi?p=flex/flex;a=commit;h=7642bd98aebb62260df923f57b794138dab6f1e7
http://flex.git.sourceforge.net/git/gitweb.cgi?p=flex/flex;a=commit;h=11b7c6cea340c2fca9b49ec635a45bd34361afe9
http://flex.git.sourceforge.net/git/gitweb.cgi?p=flex/flex;a=commit;h=ec2fdb85e0bac6e8aeca405094506e4cf8bfc0b6
Clean up svn:keywords property.
Fix for _INI regression introduced in version 20130328.

This change fixes a problem introduced in 20130328 where _INI methods
are no longer executed properly because of a memory block that is not
initialized correctly.

https://github.com/acpica/acpica/commit/637accd073a205eb4acac935f34d0eaee0c301a8
Partially revert r250128.

http://flex.git.sourceforge.net/git/gitweb.cgi?p=flex/flex;a=commit;h=ec2fdb8

This patch is known to generate a broken scanner.

http://sourceforge.net/mailarchive/message.php?msg_id=29909582
Import ACPICA 20130517.
Fix issue with "Logitech Webcam C525":

Set a valid alternate interface setting
when enumerating USB audio devices else
the device mentioned will not work like
expected.

PR:		usb/178722
MFC after:	1 week
Fix rte leak introduced in r248070.

MFC after:	2 weeks
Don't clear stall at first time use of USB MIDI endpoints.
Most likely some non-USB compliant devices will choke on it
sooner or later. Clear stall is strictly speaking not needed.
If the first MIDI command sent or transmitted is lost, this
is not a big problem for us.

MFC after:	1 week
Use separate function to update mbuf checksum flags instead of
duplicating the same code in different places.

MFC after:	2 weeks
Label the mmc child after the parent.
Correct the spelling of "okay".
Add pinmux setting for the Reset GPIO pin for MMC1.
Var_Delete: expand name to delete if needed.
Match what is in netbsd.
Fix wildcard srcs for phony targets
Update maintainers with ath/net80211.
Re-add some code to exclude transmitting if we're in reset.

This fixes some "transmitting during reset" bugs that crept in after
I messed around with this part of the transmit path.
Use my @freebsd.org username, rather than ${WORK} username.

Pointy hat provided by:	kib, thankyou!