Fix symbol usage in hashes.

Eliminate ambiguous use of symbols as hash keys.
Log rotation and properties by email.

Log rotation, gzipping, sending by email. Copies of properties files by
email.
Documentation update.
Further refine+test+debug log rotation code.

Further refine+test+debug log rotation code. Insert more verbose
debugging code and correct a coding error in mail.inc.
Standardize the filter 'init' messages.
Merge remote-tracking branch 'origin/development'