问题 Perl 6 Cro的存根不运行：请求HTTP / 2，但不支持ALPN

我用Perl 6的cro创建了一个存根服务，但由于“不支持ALPN”而导致错误。

$ cro stub http ds4 ds4
Stubbing a HTTP Service 'ds4' in 'ds4'...

First, please provide a little more information.

Secure (HTTPS) (yes/no) [no]: yes
Support HTTP/1.1 (yes/no) [yes]: 
Support HTTP/2.0 (yes/no) [yes]: 
Support Web Sockets (yes/no) [no]: yes

$ cd ds4
$ cro run
 Starting ds4 (ds4)
 Endpoint HTTPS will be at https://localhost:20000/
 Restarting ds4 (ds4)
 ds4 HTTP/2 is requested, but ALPN is not supported
 ds4   in method new at /home/zoffix/rakudo/install/share/perl6/site/sources/D142088174DCE80630FC7C31793703D9D56E26D6 (Cro::HTTP::Server) line 128
 ds4   in block <unit> at service.p6 line 5
 ds4 

我搜索了这个错误，但我得到的是关于重建nginx和Apache的信息，我没有使用。它提到了libssl，并且在我这个相当古老的安装上 libssl1.0.0:i386 和 libssl0.9.8:i386 没有新的套餐。

手动编译新的libssl可能会解决我遇到的问题吗？

更新： 假设我确实正确安装了较新的libssl，问题仍然存在：

$ cd $(mktemp -d)
$ wget https://www.openssl.org/source/openssl-1.1.1-pre6.tar.gz
$ tar -xvvf *
$ cd open*
$ ./config && make
$ make
$ sudo make install

...

$ zef uninstall Cro::Core Cro::HTTP cro Cro::TLS Cro::WebSocket OpenSSL IO::Socket::SSL IO::Socket::SSL::Async
$ zef install --/test cro
$ cro run
 Starting ds4 (ds4)
 Endpoint HTTPS will be at https://localhost:20000/
 Restarting ds4 (ds4)
 ds4 HTTP/2 is requested, but ALPN is not supported
 ds4   in method new at /home/zoffix/rakudo/install/share/perl6/site/sources/AA08D168A5945413FFDA254577A6F6FF64F66989 (Cro::HTTP::Server) line 128
 ds4   in block <unit> at service.p6 line 5
 ds4