Issue description

I can't find how to config apisix to support regular matching in uri. The nginx configuration is as follows:

location ~* /lib/([a-fA-F0-9]+)$ {
    return 301 https://example.com/lib/all/$1;
}

Environment

• apisix version (cmd: apisix version):2.2
• OS (cmd: uname -a):ubantu
• 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:2.3