MFC r225003:
Add new section "BOOTSTRAPPING" to the gpart(8), that describes bootstrap code images used to boot from MBR, GPT, BSD and VTOC8 schemes.
MFC r225023:
o Fix mdoc formatting for the '.Fx' macro. [1] o Add information about APM scheme and fix typos. [2] Submitted by: gjb [1], nwhitehorn [2]