RFR: 8067951: System.loadLibrary cannot find library when path contains quoted entry

[Ivan Gerasimov]

Hello!

Content of the environment variable PATH is appended to java.library.path.
When ClassLoader.loadLibrary() is called, these paths are used to search 
for the library file.
However, if the entry were quoted, the file locating fails.

According to this blog entry [1], quoted entries are allowed in PATH 
under Windows, so we should deal with them somehow.

On the other hand, a valid path on Unix can contain quotes, so the 
proposed patch can change the behavior for those rare environments that 
have entries in PATH starting and ending with a quote.
However, we already have ambiguity in processing the paths, as they can 
contain colon or semicolon...

Here's the proposed fix. It doesn't try to resolve all the ambiguities, 
but only adds handling entirely quoted entries.

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8067951
WEBREV: http://cr.openjdk.java.net/~igerasim/8067951/0/webrev/

Would you please help review this fix?

[1] http://blogs.msdn.com/b/oldnewthing/archive/2006/09/29/776926.aspx

Sincerely yours,
Ivan