MFC r256689:
  Use the same actor key for media types of the same speed.

  PR:		176097

MFC r256832:
  Add a note that lacp_compose_key() should be updated, when new media
  types will be added.

  Submitted by:	melifaro

Approved by:	re (hrs)
MFC r257084:
  Initialize inc_fibnum for properly handling ICMP6_PACKET_TOO_BIG
  errors in multifib environment.

  PR:		183265
Approved by:	re (hrs)
MFC: r257288

Clean up a spurious "." in SEE ALSO.

Approved by:	re (glebius)
MFC: r257287

New sentence -> new line and some mdoc cleanup.

Approved by:	re (glebius)