fix(libmatchers): python client API can use config.get options

Only `salt-ssh` can't use them actually.

* openssh/libsaltcli.jinja: detect non empty `opts['__cli']` as `api`.

* openssh/libmatchers.jinja: only `ssh` and `unknown` can't use
  `config.get` options `merge` and `delimiter`.

openssh/libsaltcli.jinja

@@ -10,6 +10,8 @@
 {%-   set cli = 'minion' %}
 {%- elif opts_cli == 'salt-call' %}
 {%-   set cli = 'ssh' if opts_masteropts_cli in ('salt-ssh', 'salt-master') else 'local' %}
+{%- elif opts_cli %}
+{%-   set cli = 'api' %}
 {%- else %}
 {%-   set cli = 'unknown' %}
 {%- endif %}