mount_9p(8): Use full month name in previos (oops).

mount_9p(8): document the new -C option.

Support optional square brackets around the host name.

The brackets are required when using numeric IPv6 addresses as they
contain colons as part of their syntax. We do not enforce that the
thing in the brackets is a numeric IPv6 address - this matches scp
syntax and behavior.

Support IPv6.

Use getaddrinfo(3). Add -4 and -6 command line options. Obey USE_INET6.

Provide list of options for ease of reference.

Sort SEE ALSO. "file system" police.

mount_9p: enable to communicate with vio9p via its character device file

With this feature, we can mount an exported filesystem by a VM host via
virtio-9p.

Handle Rerror and return errno correctly (only for 9P2000.u for now)

Merge single-letter options in SYNOPSIS.
Add an article.

mount_9p: add initial support for 9P2000.u

The implementation enables to work with a server talking 9P2000.u. However, it
doesn't use the extended fields yet; it just ignores those of received messages
and sets "please ignore" values to those of sending messages such as zero-length
strings and maximum unsigned values.

The feature is enabled by the -u option.

Add missing .Re.

Refer the current official page

Document the -s option

branches: 1.4.70;
Nits. Sort options.

branches: 1.3.4;
support standard user@host:path mount argument

Accept user as a flag. This way the usage is fstab-compliant:
mount_9p argument mountpoint

mount_9p: mount a file server using the Plan9 file sharing protocol

Works, but lots of little things to nibble on:
* fix permissions to work better
* limit the amount of open files required
* do constant folding with psshfs code
* support authentication
etcetc.