Support defining per-repository proxies.

These proxies are forward-proxy only.  They have higher priority than
any global setting on the "/software/components/spma" hierarchy.
Merge pull request #94 from piojo/spma-proxy-stuff

Support defining per-repository proxies.
Enhanced ncm-openvpn with support for multiple servers on the same host. Note that this introduced a backward-incompatible schema change.
Fix: $self->ERROR ==> $self->error
ncm-chkconfig add should become a synonym for reset

If service has a value 'add' then adding a code to ncm-chkconfig to
run 'reset'. This will restore service runlevel to its default values
and protect from any manual changes of runlevels by /sbin/chkconfig.

Addresses-Issue: #97

Conflicts:
	ncm-chkconfig/src/main/perl/chkconfig.pm
Merge pull request #99 from piojo/chkconfig-ms

ncm-chkconfig add should become a synonym for reset