git: ifconfig.8: Rearrange options and perform various updates

[Aaron LI]

commit 62ea0a9ea69be000a2f1025794269894309094a0
Author: Aaron LI <aly at aaronly.me>
Date:   Wed Dec 13 18:44:29 2023 +0800

    ifconfig.8: Rearrange options and perform various updates
    
    - Move the general options from the bottom part to the beginning.
    - Arrange the options in alphabetic order.
    - Update and/or cleanup the option descriptions.
    - Adjust various markups and styles.
    - Fix some mistakes.
    - Remove some obsolete information and commented content.
    
    Mostly obtained from FreeBSD.  Also referred to OpenBSD.

Summary of changes:
 sbin/ifconfig/ifconfig.8 | 473 ++++++++++++++++++++++++-----------------------
 1 file changed, 246 insertions(+), 227 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/62ea0a9ea69be000a2f1025794269894309094a0


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