Merge of "in-portal/branches/5.2.x@16388" to "in-portal/branches/5.3.x@16391".
Fixes INP-1422 - Store class map on disk
Fixes INP-1304 - Write e-mail processing errors to "E-mail Log"
Fixes INP-1302 - Use build-in date manipulation functions instead of adodb library
Releasing version 'branches/5.3.x' (copy from 'branches/5.2.x') of 'in-portal' module.
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