Calle Wilund 85b8d65374 commitlog: Change file format to include magic marker ...

Allows us fail fast if someone tries to replay an Origin commit log.

WARNING: This changes the file format, and there is no good way for me to
check if a CL is "old" scylla, or Origin (since "version" is the same). So
either "old" scylla files also fail, or we never fail (until later, and
worse). Thus, if upgrading from older to this patch, likewise, ensure to
have cleaned out all commit logs first.

2015-11-10 17:11:06 +01:00

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