Merge pull request #5256 from guggero/wallet-unlock-file

Auto-unlock wallet from password file

sample-lnd.conf

@@ -254,6 +254,11 @@
 ; BE USED ON MAINNET.
 ; noseedbackup=true
 
+; The full path to a file (or pipe/device) that contains the password for
+; unlocking the wallet; if set, no unlocking through RPC is possible and lnd
+; will exit if no wallet exists or the password is incorrect
+; wallet-unlock-password-file=/tmp/example.password
+
 ; Removes all transaction history from the on-chain wallet on startup, forcing a
 ; full chain rescan starting at the wallet's birthday. Implements the same
 ; functionality as btcwallet's dropwtxmgr command. Should be set to false after