(ids) add option to drop/reset suricata log file (eve.json*), closes https://github.com/opnsense/core/issues/997

(ppp) add modem dialer templates for Huawei / Sierra Wireless, https://github.com/opnsense/core/issues/1004

fix hook_stacked_form_tables (mobile), do not copy id tags. There still is some old javascript code which breaks.

(Network insight) extend help text, not supported when using RAM disk. closes https://github.com/opnsense/core/issues/999

PR: https://forum.opnsense.org/index.php?topic=3137.0

move firmware mirror/flavour settings to firmware page, closes https://github.com/opnsense/core/issues/834

first step in moving firmware settings to firmware page, https://github.com/opnsense/core/issues/834

If one deletes "plugins.inc", this way the plugin system can be
disabled.  That's a lot better than removing plugins.inc.d/
content and executing the stubs everytime anyway.

Clean-cut move to individual plugins.  Ad finished his interface
plugin rework so now it's time.  :)

As before, make this a mandatory feature for dhcp chroot in order
to catch problems with the implemenation as early as possible.

some cleanup and translation

Add a test case where it hurts: syslog startup.  :)