From Andrew Feren via bug 5774: Make V9TEMPLATE_MAX_FIELDS a user preference.

From Andrew Feren via bug 5774: Make V9TEMPLATE_MAX_FIELDS a user preference.
From me: Use lower-case v9template_max_fields instead of upper-case to avoid
any confusion with that variable being a define.  Use STRINGIFY() so we always
keep the default and the displayed default the same.  Fix bug introduced by
Andrew's patch where option_scope_field_count was inadvertently changed to
option_field_count.  Append "Maximum value can be adjusted ..." message to all
relevant expert infos.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@36643 f5534014-38df-0310-8fa8-9805f1628bb7