updated for version 7.3.975
Problem:    Crash in regexp parsing.
Solution:   Correctly compute the end of allocated memory.
Added tag v7-3-975 for changeset 44b89b025cdf
updated for version 7.3.976
Problem:    Can't build on HP-UX.
Solution:   Remove modern initialization. (John Marriott)
Added tag v7-3-976 for changeset 015a8fabf900