Fix external javadoc URL for commons-io.

- Add correct "proper/commons-io" prefix to no
  longer rely on legacy link redirects
- Add new needed path segment "/javadocs/"

See:
https://issues.apache.org/jira/browse/IO-369
http://svn.apache.org/r1451593

Backport of r1454828 from trunk.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1454830 13f79535-47bb-0310-9956-ffa450edef68
Fix javadoc.

Remove spurious leftover from r1452791.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1454831 13f79535-47bb-0310-9956-ffa450edef68
Add info about failing charset to unit test.

Backport of r1454832 from trunk.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1454835 13f79535-47bb-0310-9956-ffa450edef68
Fix unit test failing only for TC 7 (Java 6)
by excluding the Java for-internal-use-only
charset 'COMPOUND_TEXT'.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1454837 13f79535-47bb-0310-9956-ffa450edef68