Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

Regularize the Netflix copyright

Use recent best practices for Copyright form at the top of
the license:
1. Remove all the All Rights Reserved clauses on our stuff. Where we
piggybacked others, use a separate line to make things clear.
2. Use "Netflix, Inc." everywhere.
3. Use a single line for the copyright for grep friendliness.
4. Use date ranges in all places for our stuff.

Approved by: Netflix Legal (who gave me the form), adrian@ (pmc files)

Add -u (--to-unix) and -e (--to-efi) to convert unix or efi paths to
the other.

Sponsored by: Netflix

Document what the command line arguments actually do. List some of the
size limitations.

Sponsored by: Netflix

Update the "first appeared in" version in several manual pages.

MFC after: 3 days
Sponsored by: The FreeBSD Foundation

efidp manipulates UEFI Device Paths in various ways. At the moment, it
formats and parses UEFI standard Device Paths. In the future it will
also translate between FreeBSD driver names and UEFI Device Paths.

Sponsored by: Netflix