Add Metalink information and --metalink option to man page

If this option is used several times, the last one will be used.

.IP "--metalink"

Makes curl parse and process a local Metalink file (RFC 5854) and make use

If curl is built against the libmetalink library then this option can tell

curl to parse and process a local Metalink file (RFC 5854) and make use

of the mirrors listed within for failover if there are errors (such as the

file or server not being available).

Example to use a local Metalink file:

\fBcurl\fP --metalink example.metalink

If Metalink support is enabled, curl will also use remote Metalinks if they

are offered with the correct MIME type (application/metalink+xml).

(Added in 7.??.?)

Example to use a remote Metalink file:

\fBcurl\fP -O http://www.example.com/example.metalink

(Added in 7.??.?, disabled by default)

.IP "-n, --netrc"

Makes curl scan the \fI.netrc\fP (\fI_netrc\fP on Windows) file in the user's

home directory for login name and password. This is typically used for FTP on

SRP (Secure Remote Password) authentication is supported for TLS.

.IP "Metalink"

This curl supports Metalink (RFC 5854), which describes mirrors and hashes.

curl will use mirrors for failover if there are errors (such as the file or

server not being available).

.RE

.SH FILES

.I ~/.curlrc