[10] RFR: 8186930: Constant fold URI constants

[Claes Redestad]

Hi,

please review this patch to pre-calculate constants in java.net.URI and
sun.net.www.ParseUtil, removing work from runtime (reduces bytecodes
executed in the interpreter on bootstrap by ~15K).

This also removes use of BitSet from ParseUtil, which apart from being a
startup improvement also yields a small throughput improvement (~5%).

Webrev: http://cr.openjdk.java.net/~redestad/8186930/jdk.00/

Thanks!

/Claes