#164 quiet from/to parsing

[Kennard White]

This is patch to have option to eliminate syslog ERROR messages when receiving requests with "bad" From or To headers. Specifically, it adds new flags to the uri module's db_check_from and db_check_to commands. It has new flags "q" which tells it to check quietly (don't log errors to syslog) and "e" which tells it to only check for existence of well-forced user name, but don't check against the auth header. Also changes to core functions for parsing from and to headers to honor new quiet flag. All changes should be backwards compatible.

Changeset also includes some deltas from patch upload 3047314 related to "ob" parameter parsing.

[Kennard White]

patch file