Catch exceptions when parsing the log file and indicate the line which caused the problem.
Catch exceptions when parsing the log file and indicate the line which caused the problem.

git-svn-id: 81e381228600e5752b80483efd2b45b26c451ea2@1762 e27351fd-9f3e-4f54-a53b-843176b1656c

trevor/calendarserver,trevor/calendarserver,trevor/calendarserver