gcc47 warnings: A few more fixes
usr.bin/make pass -fno-address, NO_WERROR=true
usr.bin/monitor modified source file
usr.bin/netstat modified source file (2)
usr.bin/sdpquery WARNS=2, pass -fno-unused-but-set-variable
Make has several evaluations that gcc47 believes will always
(without exception) evaluate to true or false. Likely gcc47 is not
detecting some cases correctly, so -Wno-address was passed to it.
However, -Werror overrides it, so NO_WERROR had to be set on this
Makefile.
The remaining GCC warnings will be left for swildner to handle.
The -Werror flag will be suppress for GCC47 until further notice.