Update Deleted and OriginalDevices in NetworkInterfaces::Write

not to write them over and over in subsequent calls via YaPI

Author: Justus Winter <winter@pre-sense.de>

(cherry picked from commit 3f7f62d10de59e62b4bfae6a9fa55c62eec650dd)

Conflicts:

	VERSION
	library/network/src/NetworkInterfaces.ycp
	package/yast2.changes
Explained the non-obvious test case reordering.

The semantics changed from "write everything" to "write everything
that changed since the last Write" and without reordering, the
specific tests would write nothing.
Merge pull request #16 from mvidner/Code-11-SP2

Things get clear even to me, so merging.
Extended support for IPv6.

Added support for handling IPv6 specific syntax - square brackets
and link local.
Updated changelog.

Conflicts:

	VERSION
	package/yast2.changes
Revert changes in string for translation.
Updated changelog. As requested by IBS team.
allow some characters in URL password field (bnc#786757)

- 2.17.121.1
Re-enabling all disabled items (steps, proposals) if stagemode has changed

- bnc#813072
SLE-11ed the code
Changes file entry
Merge pull request #60 from kobliha/Code-11-SP2

Already approved into master
Do not reset disabled items if there was no previous stagemode
Merge pull request #68 from kobliha/Code-11-SP2

Do not reset disabled items if there was no previous stagemode
New version and changes file entry
Merge pull request #71 from kobliha/Code-11-SP2

New version and changes file entry