WL#2971 "change log-bin-trust-routine-creators=0 to apply only to functions".

Indeed now that stored procedures CALL is not binlogged, but instead the invoked substatements are,
the restrictions applied by log-bin-trust-routine-creators=0 are superfluous for procedures.
They still need to apply to functions where function calls are written to the binlog (for example as "DO myfunc(3)").
We rename the variable to log-bin-trust-function-creators but allow the old name until some future version (and issue a warning if old name is used).

mysql-test/mysql-test-run.sh

@@ -1275,7 +1275,7 @@ start_master()
           --language=$LANGUAGE \
           --innodb_data_file_path=ibdata1:128M:autoextend \
 	  --open-files-limit=1024 \
-          --log-bin-trust-routine-creators \
+          --log-bin-trust-function-creators \
 	   $MASTER_40_ARGS \
            $SMALL_SERVER \
            $EXTRA_MASTER_OPT $EXTRA_MASTER_MYSQLD_OPT \
@@ -1296,7 +1296,7 @@ start_master()
           --tmpdir=$MYSQL_TMP_DIR \
           --language=$LANGUAGE \
           --innodb_data_file_path=ibdata1:128M:autoextend \
-          --log-bin-trust-routine-creators \
+          --log-bin-trust-function-creators \
 	   $MASTER_40_ARGS \
            $SMALL_SERVER \
            $EXTRA_MASTER_OPT $EXTRA_MASTER_MYSQLD_OPT \
@@ -1429,7 +1429,7 @@ start_slave()
           --report-port=$slave_port \
           --master-retry-count=10 \
           -O slave_net_timeout=10 \
-          --log-bin-trust-routine-creators \
+          --log-bin-trust-function-creators \
            $SMALL_SERVER \
            $EXTRA_SLAVE_OPT $EXTRA_SLAVE_MYSQLD_OPT"
   CUR_MYERR=$slave_err