Improved description for property com.openexchange.oauth.google.redirectUrl to have the following content:

# The redirect URL
#
# Please ensure the following conditions are met:
# * The redirect URL specified in the Google App needs to be the same as the one specified by this property.
# * The redirect URI uses https:// as protocol
# * The redirect URI follows the pattern: https:// + <host-name> + /ajax/defer
#
# E.g. https://myappsuite.mydomain.invalid/ajax/defer