Rename fetch_existing to fetch_existing_msgs, add comment (#2042)

src/config.rs

@@ -69,8 +69,12 @@ pub enum Config {
     #[strum(props(default = "0"))] // also change MediaQuality.default() on changes
     MediaQuality,
 
-    #[strum(props(default = "0"))] // disabled for now, we'll set this back to "1" at some point
-    FetchExisting,
+    /// If set to "1", on the first time `start_io()` is called after configuring,
+    /// the newest existing messages are fetched.
+    /// Existing recipients are added to the contact database regardless of this setting.
+    #[strum(props(default = "0"))]
+    // disabled for now, we'll set this back to "1" at some point
+    FetchExistingMsgs,
 
     #[strum(props(default = "0"))]
     KeyGenType,

src/job.rs

@@ -639,7 +639,7 @@ impl Job {
         add_all_recipients_as_contacts(context, imap, Config::ConfiguredMvboxFolder).await;
         add_all_recipients_as_contacts(context, imap, Config::ConfiguredInboxFolder).await;
 
-        if context.get_config_bool(Config::FetchExisting).await {
+        if context.get_config_bool(Config::FetchExistingMsgs).await {
             for config in &[
                 Config::ConfiguredMvboxFolder,
                 Config::ConfiguredInboxFolder,

src/provider/data.rs

@@ -575,7 +575,7 @@ static P_NAUTA_CU: Lazy<Provider> = Lazy::new(|| {
         ConfigDefault { key: Config::MvboxMove, value: "0" },
         ConfigDefault { key: Config::E2eeEnabled, value: "0" },
         ConfigDefault { key: Config::MediaQuality, value: "1" },
-        ConfigDefault { key: Config::FetchExisting, value: "0" },
+        ConfigDefault { key: Config::FetchExistingMsgs, value: "0" },
     ]),
     strict_tls: false,
     oauth2_authorizer: None,