Correct man page description of -hostkey to match actual behaviour.

[originally from svn r10235]

doc/man-pl.but

@@ -149,7 +149,9 @@ a base64-encoded blob in OpenSSH's one-line format.
 
 \lcont{ Specifying this option overrides automated host key
 management; \e{only} the key(s) specified on the command-line will be
-accepted, and the host's key will not be cached. }
+accepted (unless a saved session also overrides host keys, in which
+case those will be added to), and the host key cache will not be
+written. }
 
 \dt \cw{-s}
 

doc/man-pscp.but

@@ -103,7 +103,9 @@ a base64-encoded blob in OpenSSH's one-line format.
 
 \lcont{ Specifying this option overrides automated host key
 management; \e{only} the key(s) specified on the command-line will be
-accepted, and the host's key will not be cached. }
+accepted (unless a saved session also overrides host keys, in which
+case those will be added to), and the host key cache will not be
+written. }
 
 \dt \cw{-scp}
 

doc/man-psft.but

@@ -91,7 +91,9 @@ a base64-encoded blob in OpenSSH's one-line format.
 
 \lcont{ Specifying this option overrides automated host key
 management; \e{only} the key(s) specified on the command-line will be
-accepted, and the host's key will not be cached. }
+accepted (unless a saved session also overrides host keys, in which
+case those will be added to), and the host key cache will not be
+written. }
 
 \S{psftp-manpage-commands} COMMANDS
 

doc/man-putt.but

@@ -231,7 +231,9 @@ a base64-encoded blob in OpenSSH's one-line format.
 
 \lcont{ Specifying this option overrides automated host key
 management; \e{only} the key(s) specified on the command-line will be
-accepted, and the host's key will not be cached. }
+accepted (unless a saved session also overrides host keys, in which
+case those will be added to), and the host key cache will not be
+written. }
 
 \dt \cw{\-sercfg} \e{configuration-string}