also why u no support HTTP/1.0 (which also means no HTTP/0.9) :(

When trying to use http/1.0 and http/0.9 ALPN:

$ openssl s_client -connect jstpst.net:443 -servername jstpst.net -alpn http/1.0
CONNECTED(00000003)
4027744A687F0000:error:0A000460:SSL routines:ssl3_read_bytes:reason(1120):../ssl/record/rec_layer_s3.c:1584:SSL alert number 120
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 7 bytes and written 327 bytes
Verification: OK
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
---

When I fake ALPN to http/1.1:

$ openssl s_client -connect jstpst.net:443 -servername jstpst.net -alpn http/1.1
CONNECTED(00000003)
depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1
verify return:1
depth=1 C = US, O = Let's Encrypt, CN = E6
verify return:1
depth=0 CN = jstpst.net
verify return:1
---
[ssl certs and blah blah blah...]
---
read R BLOCK
GET / HTTP/1.0

HTTP/1.0 200 OK
Alt-Svc: h3=":443"; ma=2592000
Server: Caddy
Date: Tue, 23 Jul 2024 07:38:39 GMT
Content-Length: 0

closed