fix "caddy-frontend: Update documentation according to current state"

ssl_ca_crt is still supported and needed in the UI, so put it back with
DEPRECATED information.

software/caddy-frontend/instance-slave-caddy-input-schema.json

@@ -168,6 +168,13 @@
       "textarea": true,
       "title": "[DEPRECATED] SSL Key",
       "type": "string"
+   },
+    "ssl_ca_crt": {
+      "default": "",
+      "description": "Content of the CA certificate file. Deprecated, please use key-upload-url.",
+      "textarea": true,
+      "title": "[DEPRECATED] SSL Certificate Authority's Certificate",
+      "type": "string"
     },
     "ssl_proxy_ca_crt": {
       "default": "",

[Jérome Perrin]

this }, is not indented properly and cause a test failure:

======================================================================
FAIL: test_schema_caddy-frontend_instance_slave_caddy_input_schema_json_format (slapos.test.test_json_schema.TestJSONSchemaValidation)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/srv/slapgrid/slappart7/srv/testnode/ij/inst/test0-0/parts/slapos.cookbook/slapos/test/test_json_schema.py", line 80, in run
content.splitlines())
AssertionError: Lists differ: ['{', ' "$schema": "http://js... != ['{', ' "$schema": "http://js...

First differing element 170:
' },'
' },'

[Jérome Perrin]

addressed in !612 (merged)