Prefer local chunkserver+debian updates

[eigood]

This adds the enhancement mentioned in #250. It also improves the debian packaging a little bit.

[eigood]

The package was not lintian clean. shlibs is for shared-libs, aka compiled packages.

ps: my other persona is doogie@debian.org, but I haven't been active.

[eigood]

So, removing is fine, but the arch also needs to be changed to all, as there is no compiled files in those packages.

[onlyjob]

Hello, fellow DD ;)
Don't be surprised but we already have a finished LizardFS packaging for Debian here. Besides LizardFS is waiting for approval in NEW for over a month already. I shall be happy to give you a URL with binary packages over email.

[psarna]

@eigood , thanks for a valuable contribution!

PREFER_LOCAL_CHUNKSERVER commit is under review in here: http://cr.skytechnology.pl:8081/#/c/1586 , although we need to implement and add some tests to the commit before merging it.
As for debian-related commits, we will handle them slightly later, but we won't forget about them:)

[eigood]

The by-hand testing I did was to configure multiple docker instances, for chunkserver and master. Make certain the data can be read/written. Apply my change, recompile, upgrade, make certain data is still accessible.

I didn't have a way to simulate the load we had been seeing. If this patch is accepted, however, we'd go about deploying it to the backuppc cluster we have(which is actually still moosefs).

[psarna]

@onlyjob, you have a point, a decent solution to this problem is refactoring/rewriting topology feature as a whole - and we already have a plan of doing so. I'm not able to tell you when, but this needs to be done anyway.

[eigood]

Hmm. Test cases, eh? I need to make some time to understand the test case system for lizardfs. I saw other things in gerrit that interest me.