request help: hmac-auth plguin missing H-MAC-ALGORITHM response

[liangliang4ward]

Issue description

hmac-auth plguin missing H-MAC-ALGORITHM response is error

I think when missing H-MAC-ALOGRITHM can response other message

Environment

• apisix version (cmd: apisix version): 2.10.0
• OS (cmd: uname -a):
• OpenResty / Nginx version (cmd: nginx -V or openresty -V):
• etcd version, if have (cmd: run curl http://127.0.0.1:9090/v1/server_info to get the info from server-info API):
• apisix-dashboard version, if have:
• the plugin runner version, if the issue is about a plugin runner (cmd: depended on the kind of runner):
• luarocks version, if the issue is about installation (cmd: luarocks --version):

[tzssangglass]

we should check the X-HMAC-* headers