RFR: 8260043: Reduce allocation in sun.net.www.protocol.jar.Handler.parseURL [v2]

[eirbjo]

> By moving string splitting and concatenation into the canonizeString utility, we can defer allocation until we determine that canonization is required. This saves two string allocations and a string concat for the common case where canonization is not required.
> 
> As a refactoring, move ParseUtil.canonizeString/doCanonize into Handler since that's the only call site.
> 
> Finally, let's rename the method to canonizalizeString, since canonization is an rather unrelated term.

eirbjo has updated the pull request incrementally with one additional commit since the last revision:

  As a part of the rename from "canonize" to "canonicalize", doCanonize should also be renamed. This was an oversight in the original PR.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2167/files
  - new: https://git.openjdk.java.net/jdk/pull/2167/files/6e169aa0..f4b543d6

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2167&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2167&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2167.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2167/head:pull/2167

PR: https://git.openjdk.java.net/jdk/pull/2167