Merge tag 'openafs-stable-1_6_15' into openafs-stable-1_6_x

Merge tag 'openafs-stable-1_6_15' into openafs-stable-1_6_x

OpenAFS 1.6.15

# gpg: Signature made Wed Oct 28 09:48:29 2015 EDT using RSA key ID 497DF878
# gpg: Good signature from "Jeffrey Altman <jaltman@secure-endpoints.com>"
# gpg:                 aka "Jeffrey Altman <jaltman@mit.edu>"
# gpg:                 aka "Jeffrey Altman <jaltman@gmail.com>"
# gpg:                 aka "Jeffrey Altman <jeff@sara-jeff.com>"
# gpg:                 aka "Jeffrey Altman <jeff@sara-jeff.info>"
# gpg:                 aka "Jeffrey Altman <jaltman@columbia.edu>"
# gpg:                 aka "Jeffrey Altman <secureendpoints@gmail.com>"
# gpg:                 aka "Jeffrey Altman <jaltman@secure-endpoints.se>"
# gpg:                 aka "Jeffrey Altman <jaltman@secureendpoints.com>"
# gpg:                 aka "Jeffrey Altman <jaltman@your-file-system.com>"
# gpg:                 aka "Jeffrey Altman <jaltman@openafs.org>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: D642 5358 16E2 A515 06F2  C373 DC66 D423 497D F878