[fpc-pascal] Recursive unit/include search path

[L505]

-Fu/home/me/project1/units/*.*

Is there an existing recursive option like this for -Fu and -Fi?

Could be useful, but dangerous if directories contain different versions of the source
file in different places.

Still, in many projects I get sick of continually adding new directories to the search
path - and in many projects there are not more than one version of a source file kicking
around.