Add support for the salt$iter$pwd format

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627597 13f79535-47bb-0310-9956-ffa450edef68
Add first pass at PBE handler

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627598 13f79535-47bb-0310-9956-ffa450edef68
Refactor common code to base class

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627599 13f79535-47bb-0310-9956-ffa450edef68
Add the warning

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627600 13f79535-47bb-0310-9956-ffa450edef68
Hook up credential generation

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627601 13f79535-47bb-0310-9956-ffa450edef68
Add some tests. Fix a bug and handle an edge case.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1627602 13f79535-47bb-0310-9956-ffa450edef68