doc: Note that the persistant passphrase format is unimplemented.

--

agent/keyformat.txt

@@ -240,6 +240,8 @@ This format is used to transfer keys between gpg and gpg-agent.
 Persistent Passphrase Format
 ============================
 
+Note: That this has not yet been implemented.
+
 To allow persistent storage of cached passphrases we use a scheme
 similar to the private-key storage format.  This is a master
 passphrase format where each file may protect several secrets under

common/sexp-parse.h

@@ -49,7 +49,7 @@ snext (unsigned char const **buf)
 }
 
 /* Skip over the S-Expression BUF points to and update BUF to point to
-   the chacter right behind.  DEPTH gives the initial number of open
+   the character right behind.  DEPTH gives the initial number of open
    lists and may be passed as a positive number to skip over the
    remainder of an S-Expression if the current position is somewhere
    in an S-Expression.  The function may return an error code if it