[evolution-data-server] Bug 774666 - Tell users how to keep messages on POP server indefinitely

[Milan Crha <mcrha src gnome org>]

commit e243f78fec0e439f07034ebcf5f396d4a8b230db
Author: Milan Crha <mcrha redhat com>
Date:   Tue Nov 29 19:14:44 2016 +0100

    Bug 774666 - Tell users how to keep messages on POP server indefinitely

 src/camel/providers/pop3/camel-pop3-provider.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/camel/providers/pop3/camel-pop3-provider.c b/src/camel/providers/pop3/camel-pop3-provider.c
index c3e7d15..38079a4 100644
--- a/src/camel/providers/pop3/camel-pop3-provider.c
+++ b/src/camel/providers/pop3/camel-pop3-provider.c
@@ -38,6 +38,8 @@ static CamelProviderConfEntry pop3_conf_entries[] = {
          /* Translators: '%s' is replaced with a widget, where user can
           * select how many days can be message left on the server. */
          N_("_Delete after %s day(s)"), "0:1:7:365" },
+       { CAMEL_PROVIDER_CONF_LABEL, "delete-after-days-hint", "keep-on-server",
+         N_("Hint: Use 0 days to keep messages on the server indefinitely.") },
        { CAMEL_PROVIDER_CONF_CHECKBOX, "delete-expunged", "keep-on-server",
          N_("Delete _expunged from local Inbox"), "0" },
        { CAMEL_PROVIDER_CONF_CHECKBOX, "disable-extensions", NULL,