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 (bnc#860644, bnc#868323).
config: new default to send gratuitous arp

Changed to send gratuitous arp by default, when duplicate IPv4
check is enabled and were successful (bnc#879911,fate#314399).
version 0.83.5, updated changes
netconfig: fixed manual page to not refer README (bnc#876755)
version 0.83.6, updated changes
config: changed NM_ONLINE_TIMEOUT to 30 (bnc#889175)
netconfig: set progname before using warn function
netconfig: create missed /var/run/ntp (bnc#892877)

When the directory does not exists yet, the ntp service
is not yet started/running and it is even more important
to write the servers so ntpd can pickup them at start.
config: refer to NetworkManager-wait-online.service
config: updated to list new variables in network/dhcp
config: ifcfg.template variable cleanup
config: network/config variable cleanup
spec: updated obsolete variables removal list
version 0.83.7, updated changes
rpm: fixed SUSE spelling in the spec file (bnc#889002)