RFR: regex changes

[Xueming Shen]

Hi,

There are couple regex related changes waiting for review. I have pull them
together here (with the notes) to make it easy to review.

http://cr.openjdk.java.net/~sherman/regexBackTrack.Lamnda.CanonEQ/webrev/

(1) Exponential backtracking

Note: http://cr.openjdk.java.net/~sherman/regexBackTrack.Lamnda.CanonEQ/backtracking

https://bugs.openjdk.java.net/browse/JDK-6328855
https://bugs.openjdk.java.net/browse/JDK-6192895
https://bugs.openjdk.java.net/browse/JDK-6345469
https://bugs.openjdk.java.net/browse/JDK-6988218
https://bugs.openjdk.java.net/browse/JDK-6693451
https://bugs.openjdk.java.net/browse/JDK-7006761
https://bugs.openjdk.java.net/browse/JDK-8140212

(2) Anonymous class to lambda function cleanup

Note: http://cr.openjdk.java.net/~sherman/regexBackTrack.Lamnda.CanonEQ/lambdafunction

https://bugs.openjdk.java.net/browse/JDK-8151481
https://bugs.openjdk.java.net/browse/JDK-6609854

(3) Canonical Equivalents

Note: http://cr.openjdk.java.net/~sherman/regexBackTrack.Lamnda.CanonEQ/canonEQ

https://bugs.openjdk.java.net/browse/JDK-4916384
https://bugs.openjdk.java.net/browse/JDK-4867170
https://bugs.openjdk.java.net/browse/JDK-6995635
https://bugs.openjdk.java.net/browse/JDK-6728861
https://bugs.openjdk.java.net/browse/JDK-6736245
https://bugs.openjdk.java.net/browse/JDK-7080302

Thanks
Sherman