Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55383
- Improve HTML markup of generated pages by Txt2HTML ant task.
- Use declared encoding ("ISO-8859-1") instead of default encoding to read the source files.
- Use declared line separator instead of "line.separator" property so that the file is generated the same on every plattform.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1528211 13f79535-47bb-0310-9956-ffa450edef68