ice.4: Add ToC and E835 and editorial passHEADmain

This manual is large enough and well structured enough that we can have
a clickable table of contents. Use that to move some subsections which
should not appear in Hardware Release Note to the description section.
Adjust subsection names so this will work, preserving parentheticals
for search by moving them to the bodies just below.

Strip unnecessary copyright symbols and escaped hyphens. Copyright
symbols never appear in the content of manual pages, including other
Intel manual pages, and appear to break the Hardware Release Notes.
Escaped hyphens were necessary decades ago for manual pages written
in man(7), but this page is written in mdoc(7). Also misc touchups.

Add the recently added E835 devices to the supported HARDWARE list.
Add the speed ranges to description like the other ethernet drivers.

PR:		290778
MFC after:      1 day
Fixes:		09b48f811b4b (Add support for E835-XXV-4 adapter)
Fixes:		b202176dc76d (Add PCI IDs for E835 devices)
Reviewed by:	kgalazka (previous version)
Reported by:	kgalazka (additional hardware has been added)
Reported by:	bigsneaky@duck.com (HW Relnote is truncating)

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