Cleaned up Sieve tools.

src/sieve-bin/bin-common.c

src/sieve-bin/bin-common.h

src/sieve-bin/mail-raw.c

src/sieve-bin/mail-raw.h

src/sieve-bin/namespaces.c

src/sieve-bin/namespaces.h

src/sieve-bin/sieve-exec.c

src/sieve-bin/sieve-test.c

src/sieve-bin/sievec.c

src/sieve-bin/sieved.c