restart the daemon when the app is upgraded, if Start on Boot is enabled

NOTES

@@ -1294,12 +1294,6 @@ the /sdcard nightmare that we've known all along is getting worse.
 
 
 
-XXX - restart the daemon on app upgrade
-       <receiver android:name="com.google.android.apps.youtube.app.PackageReplacedReceiver">
-            <intent-filter>
-                <action android:name="android.intent.action.MY_PACKAGE_REPLACED"/>
-            </intent-filter>
-        </receiver>
 XXX - Rich D has problem with ssh-rsa key "Exit before auth from <192.168.10.123:58978>:(user 'user', 0 fails): Non-matching signing type" but ssh -vvv on other side says "debug1: Authentication succeeded (publickey)." before it notices the remote closed the connection.  client is mint 18.3 (https://svn.dd-wrt.com/changeset/44047)
 XXX - when i am forced to upgrade to SDK 30, request MANAGE_EXTERNAL_STORAGE permission
 XXX - Vitalii suggests giving an error message for unrecognized key types (ed25519) that are encountered in authorized_keys, so the user doesn't have to stab in the dark

app/src/main/AndroidManifest.xml

@@ -37,7 +37,11 @@
 	    <intent-filter>
 		<action android:name="android.intent.action.BOOT_COMPLETED" />
 	    </intent-filter>
-	</receiver>
+	    <intent-filter>
+		<action
+		    android:name="android.intent.action.MY_PACKAGE_REPLACED" />
+	    </intent-filter>
+        </receiver>
 	<receiver android:name="StartReceiver">
 	    <intent-filter>
 		<action android:name="org.galexander.sshd.START" />

doc/index.html

@@ -97,7 +97,7 @@ greater than 1024 (because SimpleSSHD does not have root).</dd>
 
 <dt>Buffer hack for rsync+SuperSU</dt>
 <dd>A bug in SuperSU interacts with an infelicity in rsync to cause an
-occasional deadlock.  This is a real pain because I use SuperSU+rsync 
+occasional deadlock.  This is a real pain because I use SuperSU+rsync
 for system-wide backups, which will always eventually trigger the
 deadlock.  To work around this, there is a "Buffer hack" option that
 should be enabled if you use rsync with SuperSU.  It adds a miniscule
@@ -221,6 +221,7 @@ harmless.
 <h2>Change Log</h2>
 
 <ul>
+<li> <b>2021/01/XXX Version 27:</b> New approach to accessing /sdcard.  Automatically re-start on package upgrade if Start on Boot enabled.
 <li> <b>2020/12/29 Version 26:</b> Fix ed25519 host key creation.
 <li> <b>2020/12/29 Version 25:</b> Fix compatibility with WinSCP.  Update to upstream Dropbear 2020.81 -- adding ed25519 support!
 <li> <b>2020/01/01 Version 24:</b> Fix crash with "Start on Open" on Android 9. New TV icon.  Improve performance.