bootpd: Use C89 function definitions.

[jhb]

Summary

Trim a few duplicate (but incomplete) function prototypes as well.

[emaste]

libexec/bootpd/dovend.c

39

perhaps we can change these to uint8_t in a subsequent commit?

libexec/bootpd/report.c

38

this seems kind of odd (unrelated to your work)

[jhb]

libexec/bootpd/dovend.c

39

This entire codebase is in a different style from CMU. I tried to just focus on fixing the function definitions and leaving the rest alone.

libexec/bootpd/report.c

38

There's a lot of oddness in this code. :/