[bug-gawk] Gawk 4.1.1 build without socket support fails on linux.

[Dave Sines]

Attempting (on a linux system) to build gawk 4.1.1 without /inet/* support
(disabled by way of ac_cv_func_connect=no ./configure) fails due to
unguarded use of closemaybesocket macro in io.c.

Possible patch (between #v+ ... #v-, contains literal tabs):

#v+
--- gawk-4.1.1/io.c.orig        2014-03-05 04:00:36.000000000 +0000
+++ gawk-4.1.1/io.c     2014-04-09 14:40:40.000000000 +0100
@@ -166,6 +166,12 @@
 # define SOCKET                        int
 #endif
 
+#else /* HAVE_SOCKETS */
+
+#ifndef closemaybesocket
+# define closemaybesocket(fd)  close(fd)
+#endif
+
 #endif /* HAVE_SOCKETS */
 
 #ifndef HAVE_SETSID
#v-