Added include path for NetBSD to find pthread.h

Defined USE_XP_SEMAPHORES so semaphore.h is not included (Could have caused
different sizes for sem_t)

src/sbbs3/scfg/GNUmakefile

@@ -80,7 +80,7 @@ include targets.mk		# defines all targets
 include objects.mk		# defines $(OBJS)
 
 ifeq ($(os),netbsd)
- CFLAGS	+=	-D__unix__
+ CFLAGS	+=	-D__unix__ -I/usr/pkg/include
 endif
 
 ifdef USE_DIALOG		
@@ -95,6 +95,15 @@ ifdef USE_FLTK
  OBJS += $(ODIR)$(SLASH)uifcfltk.$(OFILE)
 endif
 
+# So far, only QNX has sem_timedwait() 
+ifeq ($(os),qnx)
+ LFLAGS := -lm -lsocket
+else
+ CFLAGS +=      -DUSE_XP_SEMAPHORES
+ USE_XP_SEMAPHORES      :=      1
+endif
+
+
 vpath %.c ..
 vpath %.c $(UIFC)
 vpath %.cpp $(UIFC)