docs: FTP quotes support '*' prefix to ignore errors

By default libcurl stops processing quote commands on failures.

docs/curl.1

@@ -1068,16 +1068,18 @@ file will not be read and used. See the \fI-K, --config\fP for details on the
 default config file search path.
 .IP "-Q, --quote <command>"
 (FTP/SFTP) Send an arbitrary command to the remote FTP or SFTP server. Quote
-commands are sent BEFORE the transfer takes place (just after the
+commands are sent BEFORE the transfer takes place (just after the initial PWD
-initial PWD command in an FTP transfer, to be exact). To make commands
+command in an FTP transfer, to be exact). To make commands take place after a
-take place after a successful transfer, prefix them with a dash '-'.
+successful transfer, prefix them with a dash '-'.  To make commands be sent
-To make commands be sent after libcurl has changed the working directory,
+after libcurl has changed the working directory, just before the transfer
-just before the transfer command(s), prefix the command with a '+' (this
+command(s), prefix the command with a '+' (this is only supported for
-is only supported for FTP). You may specify any number of commands. If
+FTP). You may specify any number of commands. If the server returns failure
-the server returns failure for one of the commands, the entire operation
+for one of the commands, the entire operation will be aborted. You must send
-will be aborted. You must send syntactically correct FTP commands as
+syntactically correct FTP commands as RFC 959 defines to FTP servers, or one
-RFC 959 defines to FTP servers, or one of the commands listed below to
+of the commands listed below to SFTP servers.  This option can be used
-SFTP servers.  This option can be used multiple times.
+multiple times. When speaking to a FTP server, prefix the command with an
+asterisk (*) to make libcurl continue even if the command fails as by default
+curl will stop at first failure.
 
 SFTP is a binary protocol. Unlike for FTP, libcurl interprets SFTP quote
 commands itself before sending them to the server.  File names may be quoted

docs/libcurl/curl_easy_setopt.3

@@ -1313,18 +1313,22 @@ Examples with specified ports:
 You disable PORT again and go back to using the passive version by setting
 this option to NULL.
 .IP CURLOPT_QUOTE
-Pass a pointer to a linked list of FTP or SFTP commands to pass to
+Pass a pointer to a linked list of FTP or SFTP commands to pass to the server
-the server prior to your FTP request. This will be done before any
+prior to your FTP request. This will be done before any other commands are
-other commands are issued (even before the CWD command for FTP). The
+issued (even before the CWD command for FTP). The linked list should be a
-linked list should be a fully valid list of 'struct curl_slist' structs
+fully valid list of 'struct curl_slist' structs properly filled in with text
-properly filled in with text strings. Use \fIcurl_slist_append(3)\fP
+strings. Use \fIcurl_slist_append(3)\fP to append strings (commands) to the
-to append strings (commands) to the list, and clear the entire list
+list, and clear the entire list afterwards with
-afterwards with \fIcurl_slist_free_all(3)\fP. Disable this operation
+\fIcurl_slist_free_all(3)\fP. Disable this operation again by setting a NULL
-again by setting a NULL to this option.
+to this option. When speaking to a FTP server, prefix the command with an
-The set of valid FTP commands depends on the server (see RFC959 for a
+asterisk (*) to make libcurl continue even if the command fails as by default
-list of mandatory commands).
+libcurl will stop at first failure.
-The valid SFTP commands are: chgrp, chmod, chown, ln, mkdir, pwd,
+
-rename, rm, rmdir, symlink (see
+The set of valid FTP commands depends on the server (see RFC959 for a list of
+mandatory commands).
+
+The valid SFTP commands are: chgrp, chmod, chown, ln, mkdir, pwd, rename, rm,
+rmdir, symlink (see
 .BR curl (1))
 (SFTP support added in 7.16.3)
 .IP CURLOPT_POSTQUOTE