Treat lines starting with '#' as comments in PSFTP.

[originally from svn r8325]

doc/psftp.but

@@ -143,6 +143,9 @@ Once you have started your PSFTP session, you will see a \c{psftp>}
 prompt. You can now type commands to perform file-transfer
 functions. This section lists all the available commands.
 
+Any line starting with a \cw{#} will be treated as a \i{comment}
+and ignored.
+
 \S{psftp-quoting} \I{quoting, in PSFTP}General quoting rules for PSFTP commands
 
 Most PSFTP commands are considered by the PSFTP command interpreter

psftp.c

@@ -2240,6 +2240,11 @@ struct sftp_command *sftp_getcmd(FILE *fp, int mode, int modeflags)
 	cmd->words = sresize(cmd->words, cmd->wordssize, char *);
 	cmd->words[0] = dupstr("!");
 	cmd->words[1] = dupstr(p+1);
+    } else if (*p == '#') {
+	/*
+	 * Special case: comment. Entire line is ignored.
+	 */
+	cmd->nwords = cmd->wordssize = 0;
     } else {
 
 	/*