* bump.key : private key in squid folder
  * bump.crt : cert in squid folder
  * bump_dhparam.pem : cert with df in squid folder

openssl.ss.cnf : 
  basicConstraints=CA:FALSE
  subjectAltName=DNS:*.domain.tld
  extendedKeyUsage=serverAuth

Request generation

  openssl req -new -key bump.key -extensions v3_ca -out MyRequest.csr

Certificat generation

  openssl x509 -req -in MyRequest.csr -CA bump.crt -CAkey bump.key -CAcreateserial -extfile openssl.ss.cnf -out wc_murcier.fun.crt -days 365 -sha256