Fortan problems

Hi all,

It seems Doxygen 1.8.10 does not work properly on Fortran modules.

A. If a module is not documented it is not listed on the "file 
reference" page (as expected) but all its functions/variables are (bug!).

B. If EXTRACT_PRIVATE = NO, module private functions are not listed (as 
expected) but module private variables are (bug!).

C. Implicit PRIVATE/PUBLIC/PROTECTED statements in a module work as 
expected but are not "appended" to function/variable documentation. This 
is only a nuisance.

D. If a documented function (inside or outside a module) is followed by 
one or more undocumented functions, the function calls in the following 
undocumented functions are listed in "References" of the documented 
function (bug!).

Could this issues be adressed in the next version? Thanks :)

Best regards,

Petr

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