Update `grid keygen` man page
This adds the `KEY_NAME` argument to the `grid keygen` man page.
@@ -14,11 +14,23 @@ NAME
SYNOPSIS
========
-**grid keygen** \[**FLAGS**\] \[**OPTIONS**\]
+**grid keygen** \[**FLAGS**\] \[**OPTIONS**\] <KEY_NAME>
+
+ARGS
+====
+
+`KEY_NAME`
+: The name of the keys to create. If not provided, the local username will be
+used by default. If not provided, but the `--system` option is present the name
+`gridd` will be used.
FLAGS
=====
+`-d`, `--key-dir`
+: Specify the directory for the key files;
+ defaults to $HOME/.grid/keys. Conflicts with `--system`.
+
`--force`
: Overwrite files if they exist.
@@ -28,22 +40,18 @@ FLAGS
`-q`, `--quiet`
: Do not display output.
+`--skip`
+: Check if files exist; generate if missing.
+
+`--system`
+: Generate system keys in /etc/grid/keys.
+
`-V`, `--version`
: Prints version information.
`-v`
: Log verbosely.
-OPTIONS
-=======
-
-`-d`, `--key-dir`
-: Specify the directory for the key files;
- defaults to $HOME/.grid/keys. Conflicts with `--system`.
-
-`--system`
-: Generate system keys in /etc/grid/keys.
-
SEE ALSO
========
| `grid admin(1)`
