netisr: Add wrapper for lwkt_dropmsg()

route: Routes should only be accessed from the first netisr_ncpus netisrs.

Replicate routes to the first netisr_ncpus CPUs, instead of all CPUs.

netisr: Simplify assertion related bits

netisr: Add netisr_sendmsg_oncpu()

netisr: Add add support for netisr_ncpus

- netisr_forwardmsg(), which only forwards netmsg to netisr_ncpus.
- ASSERT_NETISR_NCPUS, which asserts the thread is one of the netisrs
on netisr_ncpus.

netisr: netisr_forwardmsg -> netisr_forwardmsg_all

This function actually forwards netmsg to all available netisrs,
instead of netisr_ncpus netisrs.

For some modules, this is obviously not necessar

netisr: netisr_forwardmsg -> netisr_forwardmsg_all

This function actually forwards netmsg to all available netisrs,
instead of netisr_ncpus netisrs.

For some modules, this is obviously not necessary; they will be
fixed one-by-one later.

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netisr: Use netisr_ncpus to convert hash to cpuid.

And factor out netisr_hashlsb() for future use.

net: netisr_cpu -> netisr_threads; no functional changes.

bridge: Reduce dependency on ifnet threads.

Prepare to get rid of them.

net: Reduce dependency on ifnet threads.

Prepare to get rid of them.

kernel - Reduce BSS size (2)

* Fix a bunch of other places in the kernel where large BSS arrays are
declared. Reduces the kernel image by another ~2MB or so on top of
the ~6MB saved in the last

kernel - Reduce BSS size (2)

* Fix a bunch of other places in the kernel where large BSS arrays are
declared. Reduces the kernel image by another ~2MB or so on top of
the ~6MB saved in the last commit.

* Primarily these are places where a 'struct thread' is being embedded
in a structure which is being declared [MAXCPU]. With MAXCPU at 256
the result is pretty bloated. Changing the embedded thread to a
thread pointer removes most of the bloat.

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Remove advertising header from sys/

Correct BSD License clause numbering from 1-2-4 to 1-2-3.

Some less clear cases taken as it was done of FreeBSD.

net: Factor out ASSERT_IN_NETISR and ASSERT_IS_NETISR

route: Remove per-cpu routing threads; use netisr instead

There are several problems w/ per-cpu route thread:
- Busy netisr could potentially delay routing changes
- Blocking R_Malloc() could leave

route: Remove per-cpu routing threads; use netisr instead

There are several problems w/ per-cpu route thread:
- Busy netisr could potentially delay routing changes
- Blocking R_Malloc() could leave rtentry in inconsistent state
between netisr and routing threads.

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netisr: Add netisr_hashcpu, which maps pkt hash to cpuid

netisr: Add netisr_hashport, which finds netisr msgport based on pkt hash

netisr: Inline netisr_cpuport() and netisr_curport()

These two functions do nothing more than just return pointer to the
element in the array.

Per our header file naming convention, put these two f

netisr: Inline netisr_cpuport() and netisr_curport()

These two functions do nothing more than just return pointer to the
element in the array.

Per our header file naming convention, put these two functions in
net/netisr2.h

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