defined INT32_MAX & INT64_MAX

Signed-off-by: nixnodes <code@eth.si>
added 4k max AS length validation in parse_path_chain()

Signed-off-by: nixnodes <code@eth.si>
updated version string

Signed-off-by: nixnodes <code@eth.si>
automake

Signed-off-by: nixnodes <code@eth.si>