Add several necessary .El's.

MFC after:	2 weeks

share/man/man9/BUF_ISLOCKED.9

@@ -57,6 +57,7 @@ An exclusive lock is held by someone other than curthread
 A shared lock is held.
 .It Li 0
 The lock is not held by anyone.
+.El
 .Sh SEE ALSO
 .Xr lockstatus 9 ,
 .Xr buf 9 ,

share/man/man9/BUF_RECURSED.9

@@ -54,6 +54,7 @@ The buffer linked to the lock.
 See
 .Xr lockmgr_recursed 9
 for details.
+.El
 .Sh SEE ALSO
 .Xr buf 9 ,
 .Xr BUF_LOCK 9 ,

share/man/man9/DEVICE_PROBE.9

@@ -127,6 +127,7 @@ The driver expects its parent to tell it which children to manage
 and no probing is really done.
 The device only matches if its parent bus specifically said to use
 this driver.
+.El
 .Sh SEE ALSO
 .Xr device 9 ,
 .Xr DEVICE_ATTACH 9 ,

share/man/man9/VOP_LOCK.9

@@ -114,6 +114,7 @@ directly.
 .Fn vn_lock
 also does not want a thread specified as argument but it
 assumes curthread to be used.
+.El
 .Sh RETURN VALUES
 Zero is returned on success, otherwise an error is returned.
 .Sh SEE ALSO

share/man/man9/devfs_set_cdevpriv.9

@@ -108,7 +108,7 @@ The private driver data was not associated with current
 filedescriptor, or
 .Fn devfs_clear_cdevpriv
 was called.
-.Pp
+.El
 .Sh SEE ALSO
 .Xr open 2 ,
 .Xr close 2 ,