[gcc r11-6288] libcody: Include <netinet/in.h> as needed

[gcc r11-6288] libcody: Include <netinet/in.h> as needed

[Gerald Pfeifer]

https://gcc.gnu.org/g:cf22f78ff6ead2b1f022d7e7367daedf459aa355

commit r11-6288-gcf22f78ff6ead2b1f022d7e7367daedf459aa355
Author: Gerald Pfeifer <gerald@pfeifer.com>
Date:   Mon Dec 21 00:21:13 2020 +0100

    libcody: Include <netinet/in.h> as needed
    
    libcody as originally added to GCC fail to build on *-unknown-freebsd11.4
    and presumably others:
    
      c++ -std=c++11 -g -include config.h -I ... -MMD -MP -MF netclient.d -c
        -o netclient.o
      .../libcody/netclient.cc:114:3: error: unknown type sockaddr_in6 addr;
                                                          ^~~~~~~~~~~~
    
    sockaddr_in6 is declared in /usr/include/netinet6/in6.h,
    which is included by /usr/include/netinet/in.h.
    
    Indeed, per https://man7.org/linux/man-pages/man7/ipv6.7.html
    
        #include <sys/socket.h>
        #include <netinet/in.h>
    
    should be included, and our own gcc/ada/gsocket.h also has
    
        #if !(defined (VMS) || defined (__MINGW32__))
        #include <sys/socket.h>
        #include <sys/un.h>
        #include <netinet/in.h>
        :
        #endif
    
    libcody/ChangeLog:
    
    2020-12-21  Gerald Pfeifer  <gerald@pfeifer.com>
    
            * netserver.cc: Include <netinet/in.h>.

Diff:
---
 libcody/netserver.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libcody/netserver.cc b/libcody/netserver.cc
index 7e43eb033f4..30202c5106a 100644
--- a/libcody/netserver.cc
+++ b/libcody/netserver.cc
@@ -12,6 +12,7 @@
 #include <netdb.h>
 #include <unistd.h>
 #include <arpa/inet.h>
+#include <netinet/in.h>
 #include <sys/un.h>
 
 #ifndef AI_NUMERICSERV