This patch does the following:
- comments author names
- incorporates "9.4. Kernel Drivers, Subsystems, and Modules" into "9.2. Why Build a Custom Kernel?"
- fixes reference to 9.4 in bsdinstall chapter
- puts the configuration file section before the building the kernel section
- makes it clearer how to get src and cp the needed config file
- general wordsmithing to make the first half of this chapter less confusing