_POSIX_C_SOURCE hides declarations of things like snprintf()...

--- Makefile	2012-05-01 16:11:49.000000000 -0400
+++ Makefile	2012-06-07 13:45:54.000000000 -0400
@@ -27,5 +27,5 @@
 CFLAGS += -fno-common
 CFLAGS += -DMINIUPNPC_SET_SOCKET_TIMEOUT
-CFLAGS += -D_BSD_SOURCE -D_POSIX_C_SOURCE=1
+CFLAGS += -D_BSD_SOURCE
 CFLAGS += -ansi
 # -DNO_GETADDRINFO
@@ -102,5 +102,5 @@
 INSTALLDIRLIB = $(INSTALLPREFIX)/lib
 INSTALLDIRBIN = $(INSTALLPREFIX)/bin
-INSTALLDIRMAN = $(INSTALLPREFIX)/share/man
+INSTALLDIRMAN = $(INSTALLPREFIX)/man
 
 FILESTOINSTALL = $(LIBRARY) $(EXECUTABLES)