- stop using dlinfo() on glibc platforms but use dl_iterate_phdr() instead, as former's implementation is nothing more than a fancy cast and thus dangerously assuming that every provided handle is valid - dynload_plain test * now testing getting exec's path * workdir independent

Daniel Adler <dadler@uni-goettingen.de>
Tassilo Philipp <tphilipp@potion-studios.com>
Olivier Chafik <olivier.chafik@gmail.com>
Erik Mackdanz <erikmack@gmail.com>
Masanori Mitsugi <mitsugi@linux.vnet.ibm.com>