make ifaddrs.h expose sys/socket.h

the getifaddrs interface seems to have been invented by glibc, and
they expose socket.h, so for us not to do so is just gratuitous
incompatibility with the interface we're mimicing.

diff --git a/include/ifaddrs.h b/include/ifaddrs.h
index 800eef65971ff2075c77209aeabc1dd930cca85d..4726db6e09387019b54dd793b9faa658875669cc 100644 (file)
--- a/include/ifaddrs.h
+++ b/include/ifaddrs.h
@@ -7,6 +7,7 @@ extern "C" {
 
 #include <features.h>
 #include <netinet/in.h>
+#include <sys/socket.h>
 
 struct ifaddrs {
        struct ifaddrs *ifa_next;