[master] + implement task #1622
https://java.net/jira/browse/GRIZZLY-1622

"Make grizzly-http-servlet module osgi-depend on servlet 3.0"
[master] tabs -> spaces.
[master] Minor optimization.  Make a static initial BitSet and clone the result in the constructor.  Reduces number of repetitive BitSet.set() calls.
[master] Minor optimization.  Make a static initial BitSet and clone the result in the constructor.  Reduces number of repetitive BitSet.set() calls.