contrib: add gocryptfs-maybe.bash
contrib: add gocryptfs-maybe.bash

 Conditionally try to mount a gocryptfs filesystem. If either
 * CIPHERDIR does not exist OR
 * something is already mounted on MOUNTPOINT
 print a message to stdout (not stderr!) but exit with 0.

 This is meant to be called from automated mount systems like pam_mount,
 where you want to avoid error messages if the filesystem does not exist,
 or duplicate mounts if the filesystem has already been mounted.

rfjakob/gocryptfs,davesteele/gocryptfs,rfjakob/gocryptfs,rfjakob/gocryptfs,davesteele/gocryptfs,rfjakob/gocryptfs,davesteele/gocryptfs