add version to DCC log files

Sam Leffler noted that his DCC log file parsing script was broken by my
changes to the DCC log files after 1.0.52.  He has suggested a version
number at the start of the file.

Which would be better, changing the DATE line to something like:

    DATE: 06/07/02 12:00:38 MDT   dccm 1.1.3 file 1.2

or adding an initial line something like:

    VERSION: dccm 1.1.3 1.2


Or are there objections to changing the start of the files?

Note that the changes would also apply to files generated by `dccproc -E`
to produce

    DATE: 06/07/02 12:00:38 MDT   dccproc 1.1.3 file 1.2

or 

    VERSION: dccproc 1.1.3 1.2


Vernon Schryver    vjs@rhyolite.com