Try to upgrade to Firebird 3.0.7

[Terrence Enger]

On Sun, 2020-11-01 at 06:29 -0700, julien2412 wrote:
> 
> Remark: last time, the biggest pb was to
make it build on every envs (so
> deal with env specific patches).

Funny thing: just on Friday, I was thinking about incorporting a newer
Firebird, and I looked at some of the work to upgrade to 3.0.0.  I
decided that, without access to multiple development systems, I had no
chance of doing anything useful.

Terry.