dlend - log end of transaction
Dlend records the normal ending of a transaction in the log file.
Trid is the value returned by a previous call to dlbegin. After
dlend has been called, no further transaction calls should be
made with the same trid value.
dlbegin(C-3), dlcommit(C-3), dlcancel(C-3)
A value of -1 is returned if the transaction marker cannot be
recorded in the log file. In this case, the RMS error message is
set describing the problem.