Change name to password-strength

Makefile

@@ -4,7 +4,7 @@ GO?=go
 
 GOSRC!=find . -name '*.go'
 
-passphrase-entropy: $(GOSRC)
+password-strength: $(GOSRC)
 	$(GO) build \
 		-o $@
 
@@ -12,9 +12,9 @@ passphrase-entropy: $(GOSRC)
 RM?=rm -f
 
 clean:
-	$(RM) passphrase-entropy
+	$(RM) password-strength
 
-install: passphrase-entropy
+install: password-strength
 	mkdir -p $(BINDIR)
 	install -m755 $< $(BINDIR)/$<