Rename yes_or_no to boolean

The name yes_or_no was used only in two places and rest of the ARM
(except for the grammar glossary...) uses term boolean. Let's stick to
it.

(cherry picked from commit 0138e5c1d5)

bin/nsupdate/nsupdate.rst

@@ -256,7 +256,7 @@ The command formats and their meanings are as follows:
    in ``krb5.conf``. If no realm is specified, the saved realm is
    cleared.
 
-``check-names [yes_or_no]``
+``check-names [boolean]``
    This command turns on or off check-names processing on records to be added.
    Check-names has no effect on prerequisites or records to be deleted.
    By default check-names processing is on. If check-names processing

doc/arm/reference.rst

@@ -345,7 +345,7 @@ file documentation:
     ``percentage``
          An integer value followed by ``%`` to represent percent.
 
-    ``yes_or_no``
+    ``boolean``
         Either ``yes`` or ``no``. The words ``true`` and ``false`` are also accepted, as are the numbers ``1`` and ``0``.
 
 .. _configuration_file_grammar:
@@ -6076,7 +6076,7 @@ The :any:`trusted-keys` statement has been deprecated in favor of
    view view_name [ class ] {
        match-clients { address_match_list } ;
        match-destinations { address_match_list } ;
-       match-recursive-only yes_or_no ;
+       match-recursive-only <boolean> ;
      [ view_option ; ... ]
      [ zone_statement ; ... ]
    } ;

doc/man/nsupdate.1in

@@ -284,7 +284,7 @@ When using GSS\-TSIG, this command specifies the use of \fBrealm_name\fP rather
 in \fBkrb5.conf\fP\&. If no realm is specified, the saved realm is
 cleared.
 .TP
-.B \fBcheck\-names [yes_or_no]\fP
+.B \fBcheck\-names [boolean]\fP
 This command turns on or off check\-names processing on records to be added.
 Check\-names has no effect on prerequisites or records to be deleted.
 By default check\-names processing is on. If check\-names processing