Add index related configurations to HConstants, remove year from licence in index code, make javadoc proper for {Master|Region}ObserverExt about hindex

[anoopsjohn]

Make sure to contribute the new CP hooks to Trunk. Let us check with LarH about 94 inclusion.
We need the config enable.secondary.index??

[chrajeshbabu]

Ok. Anoop. May be enable.secondary.index config will be better name.

[anoopsjohn]

Rajesh I mean whether a config enable.secondary.index is really needed? Based on the CPs added the indexing solution can work?

[chrajeshbabu]

We will see, whether we can remove it fully. I will check this.

[chrajeshbabu]

Removed these kernel changes in hindex with 0.98 branch. Hence closing.