Add dynamic routing section

Split Foomuuri Monitor and Multiple ISP documentations to their own pages

Host-Firewall: add note where to save example configuration block

Getting-Started: add link to example foomuuri.conf file

Best-Practices: don't hide multi-isp up error, it should not fail

Best-Practices: foo9 has /usr/sbin in PATH, foo10 doesn't

Getting-Started: EPEL10, Debian Trixie

Configuration: foomuuri { log_prefix "..." }

Rule: log + "mytext"

Rule: variables in `log`

Configuration: command_down_interval

Configuration: try-reload_timeout

Configuration: prerouting chain type and hook priority

Rule: better "template" description

Getting-Started: update dependencies