[v9_11] automatically generate named.conf grammars for the ARM 4873. [doc] Grammars for named.conf included in the ARM are now automatically generated by the configuration parser itself. As a side effect of the work needed to separate zone type grammars from each other, this also makes checking of zone statements in named-checkconf more correct and consistent. [RT #36957] (cherry picked from commit 129c4414cb6cff8042f1985fe5833aaae6043142) (cherry picked from commit f662d5484e0cf4cd83da300620b3701fee5a2ca1)