Configuration files such as curl_config.h and all config-*.h no longer exist
nor are generated/copied into 'src' directory, now these only exist in 'lib'
directory from where curl tool sources uses them.
Additionally old src/setup.h has been refactored into src/tool_setup.h which
now pulls lib/setup.h
The possibility of a makefile needing an include path adjustment exists.
Test case 1315 was added to verify this functionality. When passing in
multiple files to a single -F, the parser would get all confused if one
of the specified files had a custom type= assigned.
Reported by: Colin Hogben
