GUACAMOLE-641: Add generic vault support with an initial Azure Key Vault implementation.

doc/licenses/okhttp-3.14.7/README

@@ -0,0 +1,8 @@
+OkHttp (https://github.com/square/okhttp)
+-----------------------------------------
+
+    Version: 3.14.7
+    From: 'Square, Inc.' (http://square.github.io/)
+    License(s):
+        Apache v2.0
+

doc/licenses/okhttp-3.14.7/dep-coordinates.txt

@@ -0,0 +1,3 @@
+com.squareup.okhttp3:logging-interceptor:jar:3.14.7
+com.squareup.okhttp3:okhttp-urlconnection:jar:3.14.7
+com.squareup.okhttp3:okhttp:jar:3.14.7