Implementing SSL support for adding mysql instances using mysql SSL user.

[[email protected] ~]$ sudo pmm-admin add mysql --defaults-file=/home/shahriyar.rzaev/sandboxes/rsandbox_Percona-Server-5_6_35/master/my.sandbox.cnf --user=jeffrey --password=msandbox --socket=/tmp/mysql_sandbox23700.sock msb_5_6_35
[linux:metrics] OK, already monitoring this system.
[mysql:metrics] Cannot connect to MySQL: Error 1045: Access denied for user 'jeffrey'@'localhost' (using password: YES)
Verify that MySQL user exists and has the correct privileges.
Use additional flags --user, --password, --host, --port, --socket if needed.

[client]
user               = jeffrey
password           = msandbox
port               = 23700
socket             = /tmp/mysql_sandbox23700.sock
ssl-ca=/home/shahriyar.rzaev/newcerts/ca.pem
ssl-cert=/home/shahriyar.rzaev/newcerts/client-cert.pem
ssl-key=/home/shahriyar.rzaev/newcerts/client-key.pem

[[email protected] Percona_Servers]$ ./5.7.17/bin/mysql --help | grep ssl
  --ssl-mode=name     SSL connection mode.
  --ssl               Deprecated. Use --ssl-mode instead.
                      (Defaults to on; use --skip-ssl to disable.)
  --ssl-verify-server-cert 
                      Deprecated. Use --ssl-mode=VERIFY_IDENTITY instead.
  --ssl-ca=name       CA file in PEM format.
  --ssl-capath=name   CA directory.
  --ssl-cert=name     X509 cert in PEM format.
  --ssl-cipher=name   SSL cipher to use.
  --ssl-key=name      X509 key in PEM format.
  --ssl-crl=name      Certificate revocation list.
  --ssl-crlpath=name  Certificate revocation list path.