And according to the gpg implementation: http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git&a=search&h=refs%2Fheads%2FSTABLE-BRANCH-2-0&st=grep&s=s2kmode R=agl CC=evn, golang-dev https://golang.org/cl/11355046
Manual edits to README. Moved from main Go repository, deleted Makefiles, ran gofix -r go1rename. Tested with: go test code.google.com/p/go.crypto/... R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/5564059