DragonFlyBSD/src 70839a9. Makefile_upgrade.inc, libexec/rtld-elf Makefile rtld.1

i386 removal, part 71/x: Remove legacy FreeBSD brand.

We had a compat layer in i386 that was intended to run old DragonFly
binaries from <1.2 times if my memory serves well. That also worked
with FreeBSD 4.x binaries. It was removed in part 7 and 8 of this
commit series.

This commit reverts cee191cabfed209fdad9972bd88be5b18e310361.

It also removes all references to ld-elf.so.1.

Reported-by: zrj
DeltaFile
+0-16sys/cpu/x86_64/misc/elf_machdep.c
+0-10sys/kern/imgact_elf.c
+1-2libexec/rtld-elf/Makefile
+1-2libexec/rtld-elf/rtld.1
+1-1share/man/man5/libmap.conf.5
+1-0Makefile_upgrade.inc
+0-1sys/sys/imgact_elf.h
+4-327 files

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