Also, cleaned the debian control files for proper library
dependencies.

This is a commit of a patch received in e-mail from
Klaus Darilion an embarrasingly long time ago.

This function returned an uninitialized return value in case no
sessions had been opened by the application.

libseccomp

Initialize seccomp again in dispatch threads, only requiring a
small subset of the syscalls required by the parent process.

Rewrite to use open() instead of fopen() to avoid having to
seccomp-allow the mmap() syscall.

The list of allowed syscalls is shrinked by postponing seccomp
initialization to after the PKCS#11 module is initialized and
the network socket is opened.

TLS-PSK

more stuff

Code to pass NULL strings was only used in C_InitToken, but since
the argument there was really space padded and not NULL terminated,
this code is no longer needed.

PKCS#11 v2.2 is very clear that the 'label' argument provided to
C_InitToken is *not* necessarily NULL-terminated, but rather of
fixed size (32 bytes) and whitespace-padded.

Two potential issues reported by clang.

Threads on pkcs11-proxy map to applications rather than threads in the
PKCS#11 (v2.2) specification. It is therefor important to not close
sessions opened by other threads in C_CloseAllSessions.

Since p11proxy is a threaded application, the underlying p11
module should do locking (the proxy does no locking).

New name : gck_rpc_parse_host_port().

Resolve host/service to listen on using getaddrinfo().