rework code to enable/disable remote support

we had a generic ssh key management api. this was causing issues because
the ssh format is more complicated than what we had implemented. currently,
the only use case we have is to add our ssh key.

Fixes #600

src/test/checkInstall

@@ -19,7 +19,7 @@ scripts=("${SOURCE_DIR}/src/scripts/rmvolume.sh" \
          "${SOURCE_DIR}/src/scripts/update.sh" \
          "${SOURCE_DIR}/src/scripts/collectlogs.sh" \
          "${SOURCE_DIR}/src/scripts/configurecollectd.sh" \
-         "${SOURCE_DIR}/src/scripts/authorized_keys.sh" \
+         "${SOURCE_DIR}/src/scripts/remotesupport.sh" \
          "${SOURCE_DIR}/src/scripts/backupupload.js" \
          "${SOURCE_DIR}/src/scripts/configurelogrotate.sh")