Cosmetic - change to Donation button

(paypal no longer permit donations to many countries)
fix proto sort
remove "No Limit" from rate/limit selection

(this was removed previously, but somehow managed to creep back again)
Reinstate advanced features to QOS/BWLimiter

NB - all bwlimiter variables are prefaced
with "qosl" for consistency

    Variables:

    qosl_enable     (enable limiter)
    qosl_rules
    qosl_denable    (enable defaults for unlisted clients)
    qosl_ulr
    qosl_ulc
    qosl_dlr
    qosl_dlc
    qosl_tcp
    qosl_udp
    //qosl_obw //unused, qos_ibw is shared
    //qosl_ibw //unused, qos_obw is shared
add netfilter xt_string support

see discussion at:

http://www.linksysinfo.org/index.php?threads/why-doesnt-tomatos-access-restriction-block-https-websites.45988/#post-197539
ntfs-3g release 2013.1.13
3G Support: little changes
add ttyACM0 device in basic-network page

hide some fields when 3G modem type is selected

re-apply commit: a9de670c8e72f25c08296f3e5a765061451ad9bc
Miniupnpd ver 1.7 (20121005)

- new depends: libnfnetlink
- some fixes for K24 builds
- ipv6 disabled by default (for now). We need do few changes in config file.

Conflicts:

	release/src/btools/libfoo.pl
	release/src/router/Makefile
	release/src/router/miniupnpd/upnphttp.c
	release/src/router/miniupnpd/upnpsoap.c
Miniupnpd ver 1.8 (20130207)
Miniupnpd: some changes in Makefile
Miniupnpd: lanmask has to be present as bits
Miniupnpd: fix SIGUSR2 problem
Miniupnpd: fix permissions to use dotted mask

Return to dotted mask in config file.
Miniupnpd: add custom configuration text area to GUI

Conflicts:

	release/src/router/httpd/tomato.c
	release/src/router/nvram/defaults.c
	release/src/router/www/forward-upnp.asp
Busybox 1.20.2 update
Busybox 1.20.2 update cd ..

- Avoid deadlocks on OOM situations (backported patch) - thx RMerlin

Info:
https://github.com/RMerl/asuswrt-merlin/commit/8a971c31befc3d7eaa39a7415e72b965255ff056
Busybox 1.20.2 update cd ..

- revert mkfs.ext2/ext3 aplets
Busybox: fix K24 compilation
Busybox: revert (e2)fsck aplets