tree 5c1d383fdee365d97b89642b877b0efa4a51cbc4
parent b71147a47f663582aa241c4f25f71f3bbaeaf351
author Harald Welte <laforge@gnumonks.org> 1500508059 +0200
committer Neels Hofmeyr <neels@hofmeyr.de> 1503798766 +0200

GSM timers: User reasonable defaults; don't save if equal default

A number of the GSM timers (including T3109) had no reasonable
default values if not specified in the VTY / config file.  Together
with unconditional writing to the config file, this created
config files with a persistent setting for important timers as '0'.

To make things worse, many of our example cofig files suffered from the
same problem.

Let's avoid this from happening by
* having reasonable defaults if nothing specified in the config file
* conditionally savingg timers only if they differ from default
* reject any timer values that state zero during start-up (see previous
  commit)

Change-Id: Iaac0bfca423852b61d8b9eb1438157ef00d0d8c8
Closes: OS#2380