Implicit include of sys/queue.h instead of relying on gelf.h/libelf.h to bring it
Newer version of gelf.h and libelf.h does not include sys/queue.h anymore

Submitted by:	kaiw
MFC after:	3 days
Document r260847.
Reword entry for r260888.

Sponsored by:	The FreeBSD Foundation
Document r260594.

Sponsored by:	The FreeBSD Foundation
Move r260847 to 'kernel-virtualization'.

Sponsored by:	The FreeBSD Foundation
Document r260583.

Sponsored by:	The FreeBSD Foundation