Invert logic

src/freedombone-unignore

 
 # unignore an email address
 if [ $EMAIL_ADDRESS ]; then
-    if ! grep -q "Ignore rule for $EMAIL_ADDRESS" $PM; then
+    if grep -q "Ignore rule for $EMAIL_ADDRESS" $PM; then
         sed -i "/# Ignore rule for $EMAIL_ADDRESS/,/# End of ignore rule/d" $PM
     fi
 fi