- Instead of including protocol info in diffs, strip them before adding
deltatext and take this into account when applying the diff later.
- Don't use strlen when the string in the RCS file may contain garbage. This got
caught in the checksumming before, but was not fixed until now. Instead of
using strlen, pass the token length when adding log and text entries to a
delta. Add an extra length parameter to duptext() to record the token length.
- When adding new branches to a file, add them in at the tail instead of the
head of the list to get correct ordering when writing out.
- Input stream when diffing was opened twice.
- Don't expand keywords in diffs between deltas.
