Refactor tls code to support ucspi-tls

 That includes:
 - new architecture: the tls binary is now a child of the app
instead of the other way around
 - the sbearssl_run engine now takes a post-handshake callback.
This allows s6-tlsc and s6-tlsd to only exec into the app when
the handshake succeeds (which was already the case with libressl).
 - new binaries s6-tlsc-io and s6-tlsd-io encapsulate the crypto
code; they init and run the engine, connecting to 4 already open
fds (stdin/stdout = network, argv[1] and argv[2] = local)
 - s6-tlsc is now a simple wrapper around s6-tlsc-io
 - s6-tlsd is now a simple wrapper around s6-tlsd-io
 - new binary: s6-ucspitlsd, which is also a wrapper around
s6-tlsd-io, but differently: the parent execs the app which should
be ucspi-tls-aware, the child waits for a command from the parent
and execs into s6-tlsd-io if it receives it.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/stls/deps-lib/stls b/src/stls/deps-lib/stls
index 7ecfa0b..61137c5 100644
--- a/src/stls/deps-lib/stls
+++ b/src/stls/deps-lib/stls
@@ -1,6 +1,5 @@
-stls_prep_spawn_drop.o
 stls_run.o
-stls_s6tlsc.o
-stls_s6tlsd.o
--ltls
+stls_client_init_and_handshake.o
+stls_server_init_and_handshake.o
+${CRYPTO_LIB}
 -lskarnet