Introduce support for 3rd-party auth (OAuth2 & LDAP)

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

config/config.exs

@@ -118,6 +118,30 @@ config :guardian, Guardian.DB,
 
 config :elixir, :time_zone_database, Tzdata.TimeZoneDatabase
 
+config :mobilizon,
+       Mobilizon.Service.Auth.Authenticator,
+       Mobilizon.Service.Auth.MobilizonAuthenticator
+
+config :ueberauth,
+       Ueberauth,
+       providers: []
+
+config :mobilizon, :auth, oauth_consumer_strategies: []
+
+config :mobilizon, :ldap,
+  enabled: System.get_env("LDAP_ENABLED") == "true",
+  host: System.get_env("LDAP_HOST") || "localhost",
+  port: String.to_integer(System.get_env("LDAP_PORT") || "389"),
+  ssl: System.get_env("LDAP_SSL") == "true",
+  sslopts: [],
+  tls: System.get_env("LDAP_TLS") == "true",
+  tlsopts: [],
+  base: System.get_env("LDAP_BASE") || "dc=example,dc=com",
+  uid: System.get_env("LDAP_UID") || "cn",
+  require_bind_for_search: !(System.get_env("LDAP_REQUIRE_BIND_FOR_SEARCH") == "false"),
+  bind_uid: System.get_env("LDAP_BIND_UID"),
+  bind_password: System.get_env("LDAP_BIND_PASSWORD")
+
 config :geolix,
   databases: [
     %{