Guangyuan Yang c90fb7acf0 pxeboot(8): remove antiquated information
While I was there:
- Fix some typos
- Fix an excessive argument "indent" reported by mandoc -Tlint
- Replace a dead link with the one suggested by
  https://www.uefi.org/uefi

Submitted by:	linimon (in part)
Reviewed by:	bcr
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D27774
2021-02-15 22:03:37 +00:00
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2018-04-27 22:15:18 +00:00
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