zpool/zfs: allow --json wherever -j is allowed

Mostly so that with the JSON formatting options are also used, they all
look the same. To my eye, `-j --json-flat-vdevs` suggests that they are
different or unrelated, while `--json --json-flat-vdevs` invites no
further questions.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Umer Saleem <usaleem@ixsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16632

man/man8/zfs-list.8

@@ -71,7 +71,7 @@ The following fields are displayed:
 Used for scripting mode.
 Do not print headers and separate fields by a single tab instead of arbitrary
 white space.
-.It Fl j Op Ar --json-int
+.It Fl j , -json Op Ar --json-int
 Print the output in JSON format.
 Specify
 .Sy --json-int

man/man8/zfs-mount.8

@@ -59,7 +59,7 @@
 .Xc
 Displays all ZFS file systems currently mounted.
 .Bl -tag -width "-j"
-.It Fl j
+.It Fl j , -json
 Displays all mounted file systems in JSON format.
 .El
 .It Xo

man/man8/zfs-program.8

@@ -50,7 +50,7 @@ and any attempts to access or modify other pools will cause an error.
 .
 .Sh OPTIONS
 .Bl -tag -width "-t"
-.It Fl j
+.It Fl j , -json
 Display channel program output in JSON format.
 When this flag is specified and standard output is empty -
 channel program encountered an error.

man/man8/zfs-set.8

@@ -130,7 +130,7 @@ The value
 can be used to display all properties that apply to the given dataset's type
 .Pq Sy filesystem , volume , snapshot , No or Sy bookmark .
 .Bl -tag -width "-s source"
-.It Fl j Op Ar --json-int
+.It Fl j , -json Op Ar --json-int
 Display the output in JSON format.
 Specify
 .Sy --json-int

man/man8/zpool-get.8

@@ -98,7 +98,7 @@ See the
 .Xr zpoolprops 7
 manual page for more information on the available pool properties.
 .Bl -tag -compact -offset Ds -width "-o field"
-.It Fl j Op Ar --json-int, --json-pool-key-guid
+.It Fl j , -json Op Ar --json-int, --json-pool-key-guid
 Display the list of properties in JSON format.
 Specify
 .Sy --json-int
@@ -157,7 +157,7 @@ See the
 .Xr vdevprops 7
 manual page for more information on the available pool properties.
 .Bl -tag -compact -offset Ds -width "-o field"
-.It Fl j Op Ar --json-int
+.It Fl j , -json Op Ar --json-int
 Display the list of properties in JSON format.
 Specify
 .Sy --json-int

man/man8/zpool-list.8

@@ -59,7 +59,7 @@ is specified, the command exits after
 .Ar count
 reports are printed.
 .Bl -tag -width Ds
-.It Fl j Op Ar --json-int, --json-pool-key-guid
+.It Fl j , -json Op Ar --json-int, --json-pool-key-guid
 Display the list of pools in JSON format.
 Specify
 .Sy --json-int

man/man8/zpool-status.8

@@ -70,7 +70,7 @@ See the
 option of
 .Nm zpool Cm iostat
 for complete details.
-.It Fl j Op Ar --json-int, --json-flat-vdevs, --json-pool-key-guid
+.It Fl j , -json Op Ar --json-int, --json-flat-vdevs, --json-pool-key-guid
 Display the status for ZFS pools in JSON format.
 Specify
 .Sy --json-int