Cleaned up rc.stm

Purpose of rc.stm is only ilustration---no funny things allowed.

t/data/strepo/release/rc.stm

     > result is OK
 3. Some XP thing        {os==wxx}
 3. Some Win7 thing      {os=~w7*}
-4. Some amd64 thing     {arch==amd64;proto==pop3}
+4. Some amd64 thing     {proto==pop3}
 
 Some final comments.