When an ifindex for an interface changes, some monitoring tools can no
longer find the interface and send alerts. Monitor all network
interfaces via the procd netdev parameter, so that
/etc/init.d/snmpd reload will restart snmpd if any ifindex changed.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

- Refactor RUN_C into CONFIGFILE, as used in dnsmasq and igmpproxy init
  scripts.
- Add a newline after each function definition.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

add support for "disk <partition> <size>" option

example for /etc/config/snmpd
===========
config disk
	option partition	'/'
	option size		'500'
===========

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>