Only emit bdevsw externs for entries in the bdev table, rather than for
entries in the cdev table.

branches: 1.14.2;
After thought, revert "Generate *.c files under conf/". Generate *.c files
under top build directory. *.c files are never placed just under $S/. Keep
this exclusiveness.

In `-S' mode, generate *.c files under conf/ subdirectory. Register generated
.c files to the `files' list internally.

merge a bit of duplicated code.

- add RCSID's
- fix -Wconversion (except scanner)

branches: 1.10.24;
Emit compatible struct devsw_conv when version is older than 20100430.

For the simple cases, augment device-major with information on how
a driver expects /dev/node -> minor mappings to go and include that
information in devsw_conv.
(no, I didn't plow through all the MD majors files)

output __arraycount instead of homegrown macro

Change major()/minor() to return 32-bit types again, called
devmajor_t/devminor_t, as proposed on tech-kern.
This avoids 64-bit arithmetics and 64-bit printf formats in parts
of the kernel where it is not really useful, and helps clarity.

Remove clause 3 and 4 from TNF licenses

branches: 1.5.4;
Use a common function to generate the "MACHINE GENERATED" comment,
and ensure mkswap.c adds it too.

branches: 1.4.4;
- rename {x,}error -> cfg{x,}error and {x,}warn -> cfg{x,}warn so that we
can use err(3) and warn(3) to display errors instead of using inconsistent
fprintf's.
- remove emalloc/estrdup etc. We have them in libutil.

Instead of trying to check the return value of every fprintf() and fputs()
call - which makes the code completely impossibly to follow, call fflush()
and ferror() just prior to calling fclose().
This has the advantage of actually detecting the any write errors, since
the output is block bufferred and will typically not happen during fprintf()
but only during the fclose() - where it is difficult to report.
I also singlilarly refuse to add (void) casts to every printf call in the
system - since it almost never makes any sense to look at the return value
(unless you want to know how many bytes were actually writtem).

allow configuration without swap.

config and genassym are not sysadmin tools, they are development tools.
As such, they don't belong in /usr/sbin, but rather /usr/bin. Move them
there.