fix coverity script
minor changes

print MP_DIGIT_BIT when running test
der_test: improve error output of 'short integer' test
der test: add example of decoding a X.509 v3 cert with the flexi decoder

you can define "LTC_DER_TESTS_PRINT_FLEXI" at compile time to print
the decoded cert whenn running the test executable...
well not all of it, since some parts of the cert are marked as
"context-specific" so we would need to do some further digging
...these are the parts that are output as "EOL"...
der flexi decoder: improve CONSTRUCTED type decoding

remove all teh flags
save the entire original identifier
der flexi decoder: remove duplicate code
der: add new enum element for context-specific encodings
der flexi decoder: implement decoding of context-specific data
der test: print list-element details on EOL

EOL indicates an unitialized list-element
der tests: improve/implement handling of context-specific data

no more "EOL" in the output as the flexi decoder handles now
context-specific data
dsa import: no output on stderr please