sysconfig: fixes a regression introduced with last update and additional bugfixes

This update fixes the following issues with sysconfig:
- bnc#869761,bnc#866870: ifup: startmode ifplugd logic error regression fix, Fixed a logic error regression breaking startmode ifplugd introduced while fixing bnc#846361
- bnc#860644, bnc#868323: netconfig: improved troubleshooting capabilities. Added NETCONFIG_VERBOSE and NETCONFIG_FORCE_REPLACE config variables allowing to run all netconfig calls in debug mode and force update of modified files as default. Show service, policy resolving info and log the commandline in debug mode. Fixed to log info/warnings that were printed to stderr only before.

Fixed bugs
bnc#846361
pppd does not reconnect (option persist)
bnc#860644
dns-resolver refuses to updates resolv.conf, dns resolution broken
bnc#866870
ifplug doesn't work
bnc#868323
WiFI connection internet access limited SLED12beta2
bnc#869761
sysconfig-network-0.81.5-22.1 ifup script broken for ifplugd interfaces
Selected Binaries
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