setup-network: Include ifup dependencies even if ifup is not used

... just in case another script relies on them.

References: bnc#891573
Install more programs for ifup

netconfig, sysctl, md5sum, mktemp

References: bnc#891573
Revert "setup-mount: Check for both nfs and nfs4"

Root on nfsv4 is not supported.

This reverts commit 1a28ebd79930a7ca442e6d6669b7b5e749e9bfc0.
Remove /lib/mkinitrd/{boot,setups} in postun

References: bnc#892507
Kill the dhdpcd client in ifup mode

References: bnc#891573
Retry nfs mount if network is not yet up

References: bnc#891573
Remove stray hotplug.sh from the repository
Revert "setup-mount: Check for both nfs and nfs4"

Root on nfsv4 is not supported.

This reverts commit 1a28ebd79930a7ca442e6d6669b7b5e749e9bfc0.
Merge branch 'bnc891573' into SLE11-SP3