[Bug-wget] [PATCH] fix warnings in test code

[Tim Ruehsen]

* moved test function prototypes from test.c to test.h
* fixed prototypes of test code functions
* fixed discarding 'const ' qualifiers in test code

In options.h I had to change types for option.includes and option.excludes 
from 'char **' to 'const char **' to resolve the above issues.

Well, I think most of the 'char *' or 'char **' options should be const. That 
makes the compiler shout, whenever one *accidentially* tries to write
What do you think ?

Tim

testcode_warnings.diff
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