Ticket [a80e60deb1].
Package "sum". (Pure Tcl code).
Fixed proc crc::SumSysV.
The final sum was badly masked, using % instead of the correct &.
Note: The critcl::ccommand SumSysV_c in the same file did the correct masking.
I.e. the critcl version of the implementation was not affected by this
bug, only the Tcl implementation.
Testsuite extended (sum-6.*)
Version bumped to 1.1.1.