kern_mib: remove kern.fallback_elf_brand compat sysctl

[chris.longros_gmail.com]

Summary

This compatibility alias for kern.elf{32,64}.fallback_brand has been
marked for removal since FreeBSD 6.0.

Signed-off-by: Christos Longros <[e-mail]>

[kib]

Does the extern declaration for __elfN(fallback_brand) in sys/sys/imgact_elf.h is needed after the patch? Could the __elfN(fallback_brand) var made static in kern_elf.c?

[chris.longros_gmail.com]

Good point. Updated the made __elfN(fallback_brand) from extern to static in imgact_elf.c.

[chris.longros_gmail.com]

make fallback_brand static, remove extern

[chris.longros_gmail.com]

@kib Hi, could you commit this when you time? Thanks!