Emulate inet_{pton,ntop} on systems that don't provide it.
diff --git a/configure b/configure
index 0e7ac3b..a4ac8d9 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
#! /bin/sh
-# From configure.in Revision: 1.219
+# From configure.in Revision: 1.220
# Guess values for system-dependent variables and create Makefiles.
# Generated automatically using autoconf version 2.13
@@ -4480,7 +4480,7 @@
for ac_func in alarm chown clock confstr ctermid ctermid_r execv \
flock fork fsync fdatasync fpathconf ftime ftruncate \
getgroups getlogin getpeername getpid getpwent getwd \
- kill link lstat mkfifo mktime mremap \
+ inet_pton kill link lstat mkfifo mktime mremap \
nice pathconf pause plock poll pthread_init \
putenv readlink \
select setegid seteuid setgid \