Revert to previous - scsipi_done_once is not necessary.

From riastradh@.

Document scsipi_done_once(9).

Same as scsipi_done(9) but does not run more commands from the xfer queue. It
is up to the caller of scsipi_done once to check the queue once the transfer
is complete.

branches: 1.31.18;
Remove workaround for ancient HTML generation code.

Bump date for previous. Use more markup.

Make scsipi framework MPSAFE.

Data structures are now protected by a per-adapter mutex at IPL_BIO
that is created by the scsibus or atapibus instance when the adapter
is configured.
The enable reference counter and the channel freeze counter which are
currently used by HBA code before the adapter is configured, are made
atomic.
The target drivers are now all tagged as D_MPSAFE.

Almost all HBA drivers still require the kernel lock to present,
so all callbacks into HBA code are still protected by kernel lock
unless the driver is tagged as SCSIPI_ADAPT_MPSAFE.

TODO: refactor sd and cd to use dksubr.

scsipi(9): Removed duplicate "for"

branches: 1.27.2;
Use .An -nosplit.

Use .An for authors. From PR misc/49516

branches: 1.25.2;
Use .In instead of .Aq Pa for header files.

Remove closes 3 & 4 from my licence. Lots of thanks to Soren Jacobsen
for the booring work !

Use Aq instead of \*[Lt]\*[Gt].

Continue my crusade - queueing -> queuing

.Fa Dv is redundant, only .Dv is effective, so remove the .Fa.

Typo and grammar fixes.

- s/though/through/ appropriately.
- autoconf(4) doesn't exist, autoconf(9) is the correct reference.

branches: 1.19.14; 1.19.18;
kills a few `caddr_t' occurences still present in manpage

u_intN_t -> uintN_t

Adapt man pages to ktrace-lwp.

Remove references to University of California from my copyright notices.

DMA, not dma nor Dma.

Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

Fix a typo, from Igor Sobrado in PR 19680.

successful with only one l.

New sentence, new line.

Note PERIPH_CAP_DT for DT clocking capability, and that CAP_SYNC/CAP_WIDE*
is for ST clocking only.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Sort sections.

No point in using __P in prototype declarations in man pages.

Note that ADAPTER_REQ_GROW_RESOURCES is called from the completion thread.

Boring whitespace fixes.

Document scsipi_thread_call_callback() and scsipi_target_detach()

Fix typos, punctuation and whitespace.

Add a note about scsipi_channel_thaw() and command ordering.

Manual page describing interface between scsipi middle-layer and host bus
adapters.