copy a string over itself. The library routine is documented as not
supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
+JH/32 For main options check_spool_space and check_inode_space, where the
+ platform supports 64b integers, support more than the previous 2^31 kB
+ (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
+ the previous G, M, k.
+
Exim version 4.91
-----------------