5857 add -o option to lofiadm

*** 7,17 ****
  
  SYNOPSIS
         lofiadm [-r] -a file [device]
  
  
!        lofiadm [-r] -c crypto_algorithm -a file [device]
  
  
         lofiadm [-r] -c crypto_algorithm -k raw_key_file -a file [device]
  
  
--- 7,17 ----
  
  SYNOPSIS
         lofiadm [-r] -a file [device]
  
  
!        lofiadm [-r] [-o] -c crypto_algorithm -a file [device]
  
  
         lofiadm [-r] -c crypto_algorithm -k raw_key_file -a file [device]
  
  
*** 94,103 ****
--- 94,109 ----
  
             Remove an association by file or device name, if the associated
             block device is not busy, and deallocates the block device.
  
  
+        -o
+ 
+            If the -o option is specified lofiadm will prompt for a passphrase
+            once.
+ 
+ 
         -r
  
             If the -r option is specified before the -a option, the device will
             be opened read-only.