MFC r270798:
Process STT_GNU_IFUNC when doing non-plt relocations.

MFC r270802:
Only do the second pass over non-plt relocations when the first pass
found IFUNCs.

Approved by:	re (gjb)
MFC r264995 (nwhitehorn):

    Add script to setup bootable CD ISOs for both BIOS and EFI systems.
    Tested and working on QEMU. Actually using this script as the regular
    image generator, like with the memstick one, will require that the
    kernel support EFI too. In particular, the following two things are
    required:
    1. vt(9) be the default console driver
    2. vt_efifb and vt_vga be able to coexist usefully in the same kernel

    One other note here is that this requires newfs_msdos and mdconfig,
    which is really ugly. NetBSD's makefs at least seems to support FAT
    now. If that actually works, it should be imported and we can get rid
    of the mdconfig mess.

Approved by:	re
Relnotes:	Yes
Sponsored by:	The FreeBSD Foundation
MFC r271331:
  Change how the recommended mailing list to track is
  added to the footer of the release/doc/ pages by
  moving a hard-coded value (that is subject to human
  error to change) to release.ent where other values
  are regularly changed, and adding parsing logic to
  release.xsl.

Approved by:	re (implicit, relnotes)
Sponsored by:	The FreeBSD Foundation
MFC r271284:
  Include the gssapi_krb5 library in KRB5_LDFLAGS.

PR:		156245
Approved by:	re (marius)
Sponsored by:	The FreeBSD Foundation
Connect the UEFI-capable disc1.iso and dvd1.iso variants
to the build.

This is a direct commit to stable/10.

Approved by:	re (marius)
Sponsored by:	The FreeBSD Foundation
Include the 'mini' (bootonly) UEFI memstick image
in the list of IMAGES.

This is a direct commit to stable/10.

Approved by:	re (marius)
Sponsored by:	The FreeBSD Foundation