I did a basic functionality test by connecting to a terminal server; it
seemed fine.
Note that there's more trouble coming:
```
tcp.c:313:27: warning: 'TLSv1_client_method' is deprecated [-Wdeprecated-declarations]
g_ssl_ctx = SSL_CTX_new(TLSv1_client_method());
^
/usr/lib/include/openssl/ssl.h:1854:1: note: 'TLSv1_client_method' has been explicitly marked deprecated here
DEPRECATEDIN_1_1_0(__owur const SSL_METHOD *TLSv1_client_method(void))
^
/usr/lib/include/openssl/opensslconf.h:147:34: note: expanded from macro 'DEPRECATEDIN_1_1_0'
# define DEPRECATEDIN_1_1_0(f) DECLARE_DEPRECATED(f)
^
/usr/lib/include/openssl/opensslconf.h:110:55: note: expanded from macro 'DECLARE_DEPRECATED'
# define DECLARE_DEPRECATED(f) f __attribute__ ((deprecated));
^
1 warning generated.
```