Fix inconsistencies and grammar in various files

contrib/init/bitcoind.conf

@@ -30,12 +30,12 @@ pre-start script
         echo
         echo "This password is security critical to securing wallets "
         echo "and must not be the same as the rpcuser setting."
-        echo "You can generate a suitable random password using the following"
+        echo "You can generate a suitable random password using the following "
         echo "command from the shell:"
         echo
         echo "bash -c 'tr -dc a-zA-Z0-9 < /dev/urandom | head -c32 && echo'"
         echo
-        echo "It is also recommended that you also set alertnotify so you are "
+        echo "It is recommended that you also set alertnotify so you are "
         echo "notified of problems:"
         echo
         echo "ie: alertnotify=echo %%s | mail -s \"Bitcoin Alert\"" \