Update Question 18.14, a major rework:
- Dissolve the original e-mail style description
- Add a procedure on how to make (install|build)kernel
- Recommend kgdb(1) instead of gdb(1) (based on the Developer's Handbook)
- Improve markup (suggested by gabor)
- Update path names
- Turn "FreeBSD" into &os;
- Merge wpaul's original comment into the answer
Reviewed by: trhodes
Approved by: gabor