update readme

I'm using this to catch notes, need to update files for PR later.

On current Debian stable (Bullseye, 11), the first thing I hit:

E: Package 'python3-crypto' has no installation candidate                                               

Solution: python3-pycryptodome Also: apt install ansible-mitogen

A newer golang:

~ go install git.autistici.org/ale/x509ca@latest
go install git.autistici.org/ale/ed25519gen@latest
go install git.autistici.org/ai3/go-common/cmd/pwtool@latest
export PATH=$PATH:$HOME/go/bin

package git.autistici.org/ale/x509ca@latest: cannot use path@version syntax in GOPATH mode
package git.autistici.org/ale/ed25519gen@latest: cannot use path@version syntax in GOPATH mode
package git.autistici.org/ai3/go-common/cmd/pwtool@latest: cannot use path@version syntax in GOPATH mode

~ go get git.autistici.org/ale/x509ca@latest
go get git.autistici.org/ale/ed25519gen@latest
go get git.autistici.org/ai3/go-common/cmd/pwtool@latest
export PATH=$PATH:$HOME/go/bin

Make sure $ ansible --version | grep "ansible 2" shows a version < 2.10.
Make sure `$ ansible --version | grep "python version" shows a python 3 version.

ii  ansible                                       2.10.7+merged+base+2.10.8+dfsg-1       all          Configuration management, deployment, and task execution system

We can remove that line, the newer ansible works fine