curl.1: updated protocols and polished language

.SH DESCRIPTION

.B curl

is a tool to transfer data from or to a server, using one of the supported

protocols (HTTP, HTTPS, FTP, FTPS, SCP, SFTP, TFTP, DICT, TELNET, LDAP or

FILE).  The command is designed to work without user interaction.

protocols (DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP, IMAPS, LDAP,

LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMTP, SMTPS, TELNET and TFTP).  The

command is designed to work without user interaction.

curl offers a busload of useful tricks like proxy support, user

authentication, FTP upload, HTTP post, SSL connections, cookies, file transfer

 ftp://ftp.numericals.com/file[001-100].txt    (with leading zeros)

 ftp://ftp.letters.com/file[a-z].txt

No nesting of the sequences is supported at the moment, but you can use

several ones next to each other:

Nested sequences are not supported, but you can use several ones next to each

other:

 http://any.org/archive[1996-1999]/vol[1-4]/part{a,b,c}.html

You can specify any amount of URLs on the command line. They will be fetched

in a sequential manner in the specified order.

Since curl 7.15.1 you can also specify a step counter for the ranges, so that

you can get every Nth number or letter:

You can specify a step counter for the ranges to get every Nth number or

letter:

 http://www.numericals.com/file[1-100:10].txt

 http://www.letters.com/file[a-z:2].txt

curl normally displays a progress meter during operations, indicating the amount

of transferred data, transfer speeds and estimated time left, etc.

However, since curl displays this data to the terminal by default, if you invoke

curl to do an operation and it is about to write data to the terminal, it

curl displays this data to the terminal by default, so if you invoke curl to

do an operation and it is about to write data to the terminal, it

\fIdisables\fP the progress meter as otherwise it would mess up the output

mixing progress meter and response data.

on all servers, but they enable more functionality in a better way than the

traditional PORT command.

Since curl 7.19.0, \fB--eprt\fP can be used to explicitly enable EPRT again

and \fB--no-eprt\fP is an alias for \fB--disable-eprt\fP.

\fB--eprt\fP can be used to explicitly enable EPRT again and \fB--no-eprt\fP

is an alias for \fB--disable-eprt\fP.

Disabling EPRT only changes the active behavior. If you want to switch to

passive mode you need to not use \fI-P/--ftp-port\fP or force it with

transfers. Curl will normally always first attempt to use EPSV before PASV,

but with this option, it will not try using EPSV.

Since curl 7.19.0, \fB--epsv\fP can be used to explicitly enable EPRT again

and \fB--no-epsv\fP is an alias for \fB--disable-epsv\fP.

\fB--epsv\fP can be used to explicitly enable EPRT again and \fB--no-epsv\fP

is an alias for \fB--disable-epsv\fP.

Disabling EPSV only changes the passive behavior. If you want to switch to

active mode you need to use \fI-P/--ftp-port\fP.