man8/man8.i386/dosboot.8, and man8/man8.i386/pxeboot.8.
* In all:
- First few lines of each man page should be .Dd, .Os, .Dt, .Nm;
- Use Nx; new sentence, new line; serial comma;
- Update comments about which files to keep in sync.
* In MI boot(8):
- add reference to architecture-specific boot(8);
- add commented-out reference to boot.cfg(5);
- reinstate BUGS heading that was lost when the MI boot.8 was
created from i386 boot.8.
* In i386 boot.8:
- mention -x and -z flags;
- we can boot from media other than floppy, or from the network;
- remove first paragraph in BUGS section now that an MI boot(8)
man page exists.
* In i386 dosboot.8 and pxeboot.8:
- mention -c, -x, and -z flags.