After reviewing the LGPL license, it's clear that a statically-linked
Free Pascal program can't reasonably comply with the requirements.
LGPL is best applied to dynamically-linked libraries, so it's not even
intended for the use case of Pascal units.

Therefore, a permissive ZLib license allows easiest use of this header
port. The FluidSynth library itself naturally retains its LGPL license,
and a built program making use of it must still comply with the
requirements of a dynamically-linked user.