zabbix: hide CONFIG symbols when no Zabbix package selected
As noted in #28709 OpenWrt contains CONFIG_
symbols for Zabbix even when no Zabbix package is selected.
This fixes and Closes #28709.
We add a 'guard' symbol for the menus and choices so the only
generate CONFIG symbols when 'Enable Zabbix'
(CONFIG_ZABBIX_ENABLE_ZABBIX) is selected.
We also make all the Zabbix packages depend on this symbol,
for consistency.
This operates much as the pseudo-package solution, but without
a pseudo-package required.
Signed-off-by: Daniel F. Dickinson <redacted>
git.99rst.org / openwrt-packages.git / commit