Fix typo in license notice.
man: Document Bluetooth options
pathnames: Bluetooth stuff is now in debugfs

Yay for the ABI breakage.
netstat: Fix short options for --l2cap and --rfcomm
Thanks: Lubomir
netstat.8: bump date
interface: localize & constify funcs

A bunch of these funcs are only used by interface.c, so drop them from
interface.h and mark them static.  Also mark a bunch of buffers as const
when they aren't written to.
netstat: decode timer type of 4 in tcp lines

The display of "netstat -o" (on|off|keepalive|unkn-X) is not accurate.
I think that "unkn-4" should be "probe0" that is working "probe0 timer
(= ICSK_TIME_PROBE0 status = TCP Window Size is Zero)" in kernel.

URL: https://bugzilla.redhat.com/466845
fix statistics with aliased interfaces

For virtual interfaces created using the ifcfg-ethN:X scripts the
ifconfig and netstat -i report statistics of the last real adapter
listed in /proc/dev/net.

URL: https://bugzilla.redhat.com/143981
netstat: do not abort/warn with unsupported protocols using general -A buckets

When using a bucket of protocols (like -A inet), do not warn/abort when
some protocols are not supported.

URL: https://bugzilla.redhat.com/1063906
URL: https://bugzilla.redhat.com/1063913
netstat(8): fix style in a few places
Revert "fix statistics with aliased interfaces"

This reverts commit 343192d1d8e08f576fbc0876115293f718935a59.

This fix from RedHat was actually a fix for one of their custom patches.
Applying it to mainline breaks interface stats.
netstat: INFO_GUTS1(): don't treat EACCES as error

The reason is that debugfs is accessible only by root user:
_PATH_SYS_BLUETOOTH_L2CAP  /sys/kernel/debug/bluetooth/l2cap
_PATH_SYS_BLUETOOTH_RFCOMM /sys/kernel/debug/bluetooth/rfcom

URL: https://www.kernel.org/doc/Documentation/filesystems/debugfs.txt
URL: https://bugzilla.redhat.com/show_bug.cgi?id=1162284