Use a modern email validator

lots of cleanups:

- remove dependency on register_globals at some places (include files)
- fix HTML tags (body was missing from master pages)
- indentation, coding standards, addi

lots of cleanups:

- remove dependency on register_globals at some places (include files)
- fix HTML tags (body was missing from master pages)
- indentation, coding standards, adding cvs ids
- converting some configuration related globals to constants

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Port email validation code updates from phpweb

interface for managing individual manual notes