Move properties, parameters, events, and concepts around manual sections

The pages moved as follows:
  zpool-features.{5 => 7}
  spl{-module-parameters.5 => .4}
  zfs{-module-parameters.5 => .4}
  zfs-events.5 => into zpool-events.8
  zfsconcepts.{8 => 7}
  zfsprops.{8 => 7}
  zpoolconcepts.{8 => 7}
  zpoolprops.{8 => 7}

Reviewed-by: Richard Laager <rlaager@wiktel.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Co-authored-by: Daniel Ebdrup Jensen <debdrup@FreeBSD.org>
Closes #12149
Closes #12212

man/man8/zfs.8

@@ -96,7 +96,7 @@ or
 .El
 .Pp
 See
-.Xr zfsconcepts 8
+.Xr zfsconcepts 7
 for details.
 .
 .Ss Properties
@@ -108,7 +108,7 @@ In addition, native properties are either editable or read-only.
 User properties have no effect on ZFS behavior, but you can use them to annotate
 datasets in a way that is meaningful in your environment.
 For more information about properties, see
-.Xr zfsprops 8 .
+.Xr zfsprops 7 .
 .
 .Ss Encryption
 Enabling the
@@ -354,7 +354,7 @@ Snapshots are displayed if
 The default is
 .Sy off .
 See
-.Xr zpoolprops 8
+.Xr zpoolprops 7
 for more information on pool properties.
 .Bd -literal -compact -offset Ds
 .No # Nm zfs Cm list
@@ -728,6 +728,8 @@ This option is provided for backwards compatibility with older ZFS versions.
 .Xr acl 5 ,
 .Xr attributes 5 ,
 .Xr exports 5 ,
+.Xr zfsconcepts 7 ,
+.Xr zfsprops 7 ,
 .Xr exportfs 8 ,
 .Xr mount 8 ,
 .Xr net 8 ,
@@ -768,6 +770,4 @@ This option is provided for backwards compatibility with older ZFS versions.
 .Xr zfs-upgrade 8 ,
 .Xr zfs-userspace 8 ,
 .Xr zfs-wait 8 ,
-.Xr zfsconcepts 8 ,
-.Xr zfsprops 8 ,
 .Xr zpool 8