Fetch the specific license which will be used from
    https://www.openssl.org/~appro/camellia/dist/BSD_license.txt
It isn't our concern to supply the other licences mentioned in source
files; that is realy not our problem.
pour some water on an ass ember
spotted by doctor jsing, always keeping an eye out for these
Remove PSK from the ssl regress.
switch from bpf_mtap to the shiny new bpf_mtap_stripvlan.
bpf listeners on a vlan interface don't expect to see a vlan header (you
expect those on the underlaying if). since we no longer prepend an ethernet
header to later throw it away and prepend an ether_vlan_header, we prepend
a ether_vlan_header right away. to unconfuse bpf listeners we need to cut
the 4 extra bytes out, which is what bpf_mtap_stripvlan does.
problem noticed by dlg with dhcrelay, ok benno dlg
Trim down comments to those that are actually helpful for reading the file,
that is, only leave those after multiple .. and before multiple dir names.
While here, fix two comments that were actually wrong
and garbage collect one /set instruction that had no effect.
Saves 415 lines, which is 35% of the file.

ok sthen@ henning@
CPU_BUSY_CYCLE(): A new MI statement for busy loop power reduction

The new CPU_BUSY_CYCLE() may be put in a busy loop body so that CPU can reduce
power consumption, as Linux's cpu_relax() and FreeBSD's cpu_spinwait().  To
start minimally, use PAUSE on i386/amd64 and empty on others.  The name is
chosen following the existing cpu_idle_*() functions.  Naming and API may be
polished later.

OK kettenis@
Suspicions confirmed by sthen's searching that nothing uses ossl_ssize_t
except embedded openssl's in other trees.
Don't hold the kernel lock while halting a processor. Assert if we detect
this happening.

ok kettenis@, deraadt@
Remove unused files.
Even though occasional commits did happen to these files, they still
specify directories like /usr/share/man/cat4/tahoe, /usr/include/pascal,
/usr/X11R4 and so on, so calling them "maintained" would seem a bold claim.
ok sthen@ henning@