Note that "conninfo" must not be a connection URI.

Per GitHub #321.

README.md

@@ -400,7 +400,8 @@ least the following parameters:
 - `conninfo`: a valid connection string for the `repmgr` database on the
      *current* server. (On the standby, the database will not yet exist, but
      `repmgr` needs to know the connection details to complete the setup
-     process).
+     process). *NOTE* this must be a keyword/value string, not a connection
+     URI; this limitation will be removed in a future `repmgr` version.
 
 `repmgr.conf` should not be stored inside the PostgreSQL data directory,
 as it could be overwritten when setting up or reinitialising the PostgreSQL

repmgr.conf.sample

@@ -26,11 +26,14 @@
                  # the server's hostname or another identifier unambiguously
                  # associated with the server to avoid confusion
 
-# Database connection information as a conninfo string
-# This must be accessible to all servers in the cluster; for details see:
+# Database connection information as a conninfo string (this must be a
+# keyword/value string, not a connection URI).
 #
 #   https://www.postgresql.org/docs/current/static/libpq-connect.html#LIBPQ-CONNSTRING
 #
+# All servers in the cluster must be able to access the database
+# using this connection string.
+#
 #conninfo='host=192.168.204.104 dbname=repmgr user=repmgr'
 #
 # If repmgrd is in use, consider explicitly setting `connect_timeout` in the