RFR 8207690: SearchPath API for classpath and similar path strings

[Roger Riggs]

Please review a refreshed API for parsing search and using paths.
Thanks for the earlier comments and suggestions.

java.util.SearchPath is an immutable sequence of strings, typically 
filesystem paths.
A search path is created from a list of strings or by splitting a string 
using File.pathSeparator.


Webrev: http://cr.openjdk.java.net/~rriggs/webrev-searchpath-8207690-1/

Javadoc: 
http://cr.openjdk.java.net/~rriggs/searchpath-8208208/java.base/java/util/SearchPath.html

Issue: https://bugs.openjdk.java.net/browse/JDK-8207690

CSR: https://bugs.openjdk.java.net/browse/JDK-8208208

Thanks, Roger