* log_format.cc, log_format_impls.cc, log_format.hh: Change
log_scanf to return a pointer to the character in the
time string that was not part of the time. Change the
generic log format to try and pull out the millisecond
value from the timestamp.
* test/Makefile.am: Fix some dist problems.
* test/logfile_generic.0: Test logfile for the generic log format.
