in_ifadown: Don't migrate CPU when delete addr routes; use rt_threads
rtchange: Don't migrate CPU when change routes ifaddr; use rt_threads
altq: Make sure mbuf contains pkthdr in enqueue method
altq: Update comment
wlan: 802.11 devices and vap is not ready for ALTQ packet schedulers

Current power saving queue inject and send queue flush code do not
work with ALTQ packet schedulers.
kernel - Fix a case in the path lookup that results in high latencies

* When many cpu cores are looking up paths with matching components,
  so as when doing a parallel buildworld or a parallel build of
  /usr/src/lib/libc, the namecache's shared/exclusive lock mechanic
  can break-down and create a chain-reaction of exclusive locks which
  destroys performance.

* When attempting to get a shared lock we were previously backing-down to
  an exclusive lock if the shared lock could not be obtained non-blocking.
  The original code could cause a chain-reaction of unnecessary exclusive
  locks.

  Instead, we now only back-down to an exclusive lock only if the current
  thread already holds an exclusive lock on the same namecache entry
  or if we detect that another thread is trying to get an exclusive lock.
  Otherwise we fall-through and obtain the shared lock in a blocking manner.

Reported-by: ftigeot
kernel - Enable ncp shared locks by default.

* Change debug.ncp_shared_lock_disable to 0, enabling ncp shared
  locks in master by default.
altq: Add byte based limit and counter

- This avoids having too much mbufs sitting on the send queue for TSO
  capable devices.  Even by default, DragonFly has already limited TSO
  burst to at most 4 TCP segments, for TSO capable devices, there still
  could be 4 times mbufs sitting on the send queue compared with non-TSO
  capable devices.
- This paves way for the AQMs, which require send queue byte counter,
  e.g. CoDel.

For ethernet devices, the byte based limit is (1514 x max_packets).

For other devices, e.g. pseudo devices, the byte based limit is
(MCLBYTES x max_packets).
socket: Prioritiries rcvd message
bsd-family-tree: Sync with FreeBSD (adds NetBSD 6.1 and FreeBSD 8.4).
Fix some printf()s.
Adjust some manual pages for dports.
build.7: Some more clarification.
<sys/thread.h>: Remove two unnecessary forward declarations.

They are in <sys/msgport.h> which is included by <sys/thread.h>.
Adjust some more files for dports.
ppbus.4: Mention DEBUG_1284.
pcb: Allow kmalloc(WAITOK) to return in in_pcballoc()

The PCB kmalloc limit could be exceeded on local netperf TCP_CC with the
default MSL; panic is obviously not wanted under this situation.
Merge branch 'master' into gsocdrm_alter