Set Host header when invoking curl

[ryandesign (Ryan Carsten Schmidt)]

curl versions from 7.37.0 (2014) up to but not including 7.82.0 (2022) fail to handle the situation where a web site's canonical hostname ends with a period. See ​https://github.com/curl/curl/issues/8290. Here is an example of the problem:

% /usr/bin/curl --version
curl 7.79.1 (x86_64-apple-darwin21.0) libcurl/7.79.1 (SecureTransport) LibreSSL/3.3.5 zlib/1.2.11 nghttp2/1.45.1
Release-Date: 2021-09-22
Protocols: dict file ftp ftps gopher gophers http https imap imaps ldap ldaps mqtt pop3 pop3s rtsp smb smbs smtp smtps telnet tftp 
Features: alt-svc AsynchDNS GSS-API HSTS HTTP2 HTTPS-proxy IPv6 Kerberos Largefile libz MultiSSL NTLM NTLM_WB SPNEGO SSL UnixSockets

% /usr/bin/curl -I https://pyropus.ca./
HTTP/1.1 301 Moved Permanently
Date: Mon, 03 Apr 2023 01:17:16 GMT
Server: Apache/2.4.56 (Debian)
Location: https://pyropus.ca./
Content-Type: text/html; charset=iso-8859-1

The memtester port is an example that fails to fetch distfiles because of this (if the master_sites override is removed from the Portfile). It also fails livecheck.

It was pointed out to me by the author of memtester that affect curl versions can be made to work by setting the Host header properly, as in:

% /usr/bin/curl -H 'Host: pyropus.ca.' -I https://pyropus.ca./
HTTP/1.1 200 OK
Date: Mon, 03 Apr 2023 01:18:35 GMT
Server: Apache/2.4.56 (Debian)
Accept-Ranges: bytes
Vary: Accept-Encoding
X-Frame-Options: sameorigin
Content-Type: text/html

MacPorts should use a regexp to extract the host out of the URL and set the Host header every time it invokes curl for any purpose to work around buggy curl versions.