fix a/an grammar in obvious cases

branches: 1.23.4;
opencrypto: Touch up man page a little.

opencrypto: crypto_dispatch never fails now. Make it return void.

Same with crypto_kdispatch.

opencrypto: Rip out EAGAIN logic when unregistering crypto drivers.

I'm pretty sure this never worked reliably based on code inspection,
and it's unlikely to have ever been tested because it only applies
when unregistering a driver -- but we have no crypto drivers for
removable devices, so it would only apply if we went out of our way
to trigger detach with drvctl.

Instead, just make the operation fail with ENODEV, and remove all the
callback logic to resubmit the request on EAGAIN. (Maybe this should
be ENXIO, but crypto_kdispatch already does ENODEV.)

opencrypto: Make crypto_freesession return void.

No callers use the return value. It is not sensible to allow this to
fail.

opencrypto: Make freesession callback return void.

No functional change intended: all drivers already return zero
unconditionally.

opencrypto: Assert num>0 in crypto_getreq, num=1 in crypto_kgetreq.

- For crypto_getreq this makes downstream reasoning easier: on
success, crp_desc is guaranteed to be nonnull.

- For crypto_kgetreq, this was already assumed, just silently
ignored and not checked by anything.

Remove workaround for ancient HTML generation code.

New sentence, new line. Punctuation fixes.

update opencrypto(9)

Clear up documentation for crypto_unregister() vs crypto_unregister_all()
since there is no definition of CRYPTO_ALGORITHM_ALL!

XXX The description of the arguments for crypto_register() needs further
updates, too, but that will be left for another day.

Use Mt for email addresses.

branches: 1.12.2; 1.12.8; 1.12.12;
Update list of algorithm identifiers available in opencrypto(9).

-in the descriptor for encryption xforms, split the "blocksize" field
into "blocksize" and "IV size"
-add an "reinit" function pointer which, if set, means that the xform
does its IV handling itself and doesn't want the default CBC handling
by the framework (poor name, but left that way to avoid unecessary
differences)
This syncs with Open/FreeBSD, purpose is to allow non-CBC transforms.
Refer to ivsize instead of blocksize where appropriate.
(At this point, blocksize and ivsize are identical.)

Fix typo. Make HTML-ready. Remove trailing whitespace. Add dot in
abbreviation.

Document sysctls

Fix typographics errors.

Sort SEE ALSO. Drop trailing whitespace.

Remove redundant markup. Add missing width for .Bl -tag.

branches: 1.5.18; 1.5.20; 1.5.24;
- kcont was removed.
- Replace some references to tsleep.

running in emulated wizd mode, convert caddr_t to void *.

s/netbsd.org/NetBSD.org/g

Use In instead of Fd #include <...>; reword a sentence so
it is easier to read.

Add opencrypto.9 manpage, manpage copied from OpenBSD (Angelos D. Keromytis)
Some text added me (and thus all errors in the manpage are mine)