[packages] olsrd: init: parse new var 'speed', which translates to several other...

[packages] olsrd: init: parse new var 'speed', which translates to several other vars

Range is 1...20 where 1 is fastest protocol speed and 20 is the slowest protocol speed

Like in the Freifunk-Firmware from sven-ola we accept now a per-interface
option 'speed', which should range from 1...20 and is sanitized. when the
value is not in valid range, it defaults to 6 which allows the daemon to
start and behave like in a city-wide mesh. (same default like in freifunk firmware)

The value 'speed' overrides the normal values for emission intervals like
Hello-, Tc-, Mid-, Hna-Interval/ValidityTime or sets them explicitely. this
makes it much easier to play with intervals on several routers:

Instead of changes eight values, we only have to alter 1 value.

The value-calculation is tested since several years.

Signed-off-by: Bastian Bittorf <bittorf@bluebottle.com>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@36299 3c298f89-4303-0410-b956-a3cf2f4a3e73