hack: add script to regenerate certificates
hack: add script to regenerate certificates

Certificates were originally added in c000cb64712349141596318dea2a8de2462c8f81,
but did not include a script to generate them. Current versions of Go expect
certificates to use SAN instead of Common Name fields, so updating the script
to include those;

    x509: certificate relies on legacy Common Name field, use SANs or temporarily
    enable Common Name matching with GODEBUG=x509ignoreCN=0

Some fields were updated to be a bit more descriptive (instead of "replaceme"),
and the `-text` option was used to include a human-readable variant of the
content.

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

jimjag/docker,nawawi/docker,cpuguy83/docker,thaJeztah/docker,cpuguy83/docker,docker/docker,nawawi/docker,jameszhan/docker,mahak/docker,yosifkit/docker,moul/docker,vdemeester/docker,vdemeester/docker,gnailuy/docker,flavio/docker,Ramzec/docker,djs55/docker,moul/docker,vdemeester/docker,docker/docker,Ramzec/docker,thaJeztah/docker,nalind/docker,jimjag/docker,konstruktoid/docker-upstream,thaJeztah/docker,konstruktoid/docker-upstream,yosifkit/docker,nalind/docker,AkihiroSuda/docker,paralin/docker,jthelin/docker,trebonian/docker,moul/docker,yosifkit/docker,nalind/docker,AkihiroSuda/docker,Ramzec/docker,bearstech/moby,paralin/docker,bearstech/moby,gnailuy/docker,nawawi/docker,Mokolea/docker,yosifkit/docker,cpuguy83/docker,thaJeztah/docker,trebonian/docker,mahak/docker,Mokolea/docker,paralin/docker,gnailuy/docker,AkihiroSuda/docker,mahak/docker,jameszhan/docker,djs55/docker,gnailuy/docker,jimjag/docker,Mokolea/docker,konstruktoid/docker-upstream,bearstech/moby,jthelin/docker,moul/docker,cpuguy83/docker,jameszhan/docker,mahak/docker,trebonian/docker,moby/moby,trebonian/docker,bearstech/moby,Mokolea/docker,paralin/docker,jimjag/docker,flavio/docker,nalind/docker,flavio/docker,docker/docker,djs55/docker,flavio/docker,AkihiroSuda/docker,nawawi/docker,moby/moby,Ramzec/docker,moby/moby,moby/moby,konstruktoid/docker-upstream