Disable "download by date range" for webdav and pop3.

The previous behavior caused catastrophic network abuse, downloading
messages outside the date range over and over.

src/com/fsck/k9/Account.java

@@ -977,6 +977,18 @@ public class Account implements BaseAccount {
         return Store.getRemoteInstance(this);
     }
 
+    // It'd be great if this actually went into the store implementation
+    // to get this, but that's expensive and not easilly accessible
+    // during initialization
+    public boolean isSearchByDateCapable() {
+        if (getStoreUri().startsWith("imap")) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+
     @Override
     public synchronized String toString() {
         return mDescription;

src/com/fsck/k9/activity/setup/AccountSettings.java

@@ -385,18 +385,26 @@ public class AccountSettings extends K9PreferenceActivity {
             }
         });
 
+    
+
         mMessageAge = (ListPreference) findPreference(PREFERENCE_MESSAGE_AGE);
-        mMessageAge.setValue(String.valueOf(mAccount.getMaximumPolledMessageAge()));
+
-        mMessageAge.setSummary(mMessageAge.getEntry());
+        if (!mAccount.isSearchByDateCapable()) {
-        mMessageAge.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            mMessageAge.setEnabled(false);
-            public boolean onPreferenceChange(Preference preference, Object newValue) {
+        } else {
-                final String summary = newValue.toString();
+	        mMessageAge.setValue(String.valueOf(mAccount.getMaximumPolledMessageAge()));
-                int index = mMessageAge.findIndexOfValue(summary);
+	        mMessageAge.setSummary(mMessageAge.getEntry());
-                mMessageAge.setSummary(mMessageAge.getEntries()[index]);
+	        mMessageAge.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
-                mMessageAge.setValue(summary);
+	            public boolean onPreferenceChange(Preference preference, Object newValue) {
-                return false;
+	                final String summary = newValue.toString();
-            }
+	                int index = mMessageAge.findIndexOfValue(summary);
-        });
+	                mMessageAge.setSummary(mMessageAge.getEntries()[index]);
+	                mMessageAge.setValue(summary);
+	                return false;
+	            }
+	        });
+	
+        }
 
         mMessageSize = (ListPreference) findPreference(PREFERENCE_MESSAGE_SIZE);
         mMessageSize.setValue(String.valueOf(mAccount.getMaximumAutoDownloadMessageSize()));
@@ -683,8 +691,10 @@ public class AccountSettings extends K9PreferenceActivity {
         mAccount.setNotifySelfNewMail(mAccountNotifySelf.isChecked());
         mAccount.setShowOngoing(mAccountNotifySync.isChecked());
         mAccount.setDisplayCount(Integer.parseInt(mDisplayCount.getValue()));
-        mAccount.setMaximumPolledMessageAge(Integer.parseInt(mMessageAge.getValue()));
         mAccount.setMaximumAutoDownloadMessageSize(Integer.parseInt(mMessageSize.getValue()));
+        if (mAccount.isSearchByDateCapable()) {
+            mAccount.setMaximumPolledMessageAge(Integer.parseInt(mMessageAge.getValue()));
+        }
         mAccount.getNotificationSetting().setVibrate(mAccountVibrate.isChecked());
         mAccount.getNotificationSetting().setVibratePattern(Integer.parseInt(mAccountVibratePattern.getValue()));
         mAccount.getNotificationSetting().setVibrateTimes(Integer.parseInt(mAccountVibrateTimes.getValue()));

src/com/fsck/k9/controller/MessagingController.java

@@ -1534,7 +1534,7 @@ public class MessagingController implements Runnable {
             return false;
 
         }
-        if (message.olderThan(earliestDate)) {
+        if (account.isSearchByDateCapable() && message.olderThan(earliestDate)) {
             if (K9.DEBUG) {
                 Log.d(K9.LOG_TAG, "Message " + message.getUid() + " is older than "
                       + earliestDate + ", hence not saving");