SSL handshake segfaults if BIO_do_connnect don't connect

[sha0coder]

V version: V 0.1.23 f0f62f6
OS: archlinux
What did you do? http.get("https://127.0.0.1")
What did you see instead? SIGSEGV

Solution:
on v/vlib/http/backend_nix.v ssl_do()

Dont do the handshake if BIO_do_connect fails.

res = C.BIO_do_connect(web)
if res != 1 {
return error('cannot connect')
}
res = C.BIO_do_handshake(web)

Crash:
Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7ccd680 in ?? () from /usr/lib/libcrypto.so.1.1
(gdb) bt
#0 0x00007ffff7ccd680 in ?? () from /usr/lib/libcrypto.so.1.1
#1 0x00007ffff7cd0ef4 in BIO_connect () from /usr/lib/libcrypto.so.1.1
#2 0x00007ffff7cd63af in ?? () from /usr/lib/libcrypto.so.1.1
#3 0x00007ffff7cd6690 in ?? () from /usr/lib/libcrypto.so.1.1
#4 0x00007ffff7cd450a in ?? () from /usr/lib/libcrypto.so.1.1
#5 0x00007ffff7cd3534 in ?? () from /usr/lib/libcrypto.so.1.1
#6 0x00007ffff7cd3a13 in BIO_write () from /usr/lib/libcrypto.so.1.1
#7 0x00007ffff7cd1d62 in ?? () from /usr/lib/libcrypto.so.1.1
#8 0x00007ffff7cd3ee6 in BIO_ctrl () from /usr/lib/libcrypto.so.1.1
#9 0x00007ffff7f4bd5e in ?? () from /usr/lib/libssl.so.1.1
#10 0x00007ffff7f50800 in ?? () from /usr/lib/libssl.so.1.1
#11 0x00007ffff7f4b252 in ?? () from /usr/lib/libssl.so.1.1
#12 0x00007ffff7f37136 in SSL_do_handshake () from /usr/lib/libssl.so.1.1
#13 0x00007ffff7f1c46b in ?? () from /usr/lib/libssl.so.1.1
#14 0x00007ffff7cd3ee6 in BIO_ctrl () from /usr/lib/libcrypto.so.1.1
#15 0x000055555556cc6e in http__Request_ssl_do ()
#16 0x000055555556e7a8 in http__Request_method_and_url_to_response ()
#17 0x000055555556e074 in http__Request_do ()
#18 0x000055555556d1af in http.get ()

[sha0coder]

simply add this between the connect and the handshake:
if res != 1 {
return error('cannot connect')
}

[sha0coder]

PR applied