ogress.]
<li> <code>mpf_set_str</code> doesn't validate it's exponent, for instance
     garbage 123.456eX789X is accepted (and an exponent 0 used), and overflow
     of a <code>long</code> is not detected.
<li> <code>mpf_add</code> doesn't check for a carry from truncated portions of
     the inputs, and in that respect doesn't implement the "infinite precision
     followed by truncate" specified in the manual.
<li> Windows DLLs: tests/mpz/reuse.c and tests/mpf/reuse.c initialize global
     variables wit