Enable Travis CI IPv6 loopback network for testing (#15)

Enable ipv6 using sysctl

Author: kosh04

.travis.yml

@@ -1,6 +1,7 @@
 language: c
 
-sudo: false
+dist: trusty
+sudo: required
 
 os:
   - linux
@@ -39,13 +40,14 @@ matrix:
       after_success: echo "Skip report coverage"
 
 before_install:
+  - source ./ci/before_install_${TRAVIS_OS_NAME}.sh
   - source ./ci/coveralls/before_install_${TRAVIS_OS_NAME}.sh
   - pip install --user codecov
 
 script:
   - make CC="$CC --coverage"
   - file ./newlisp && ./newlisp -v
-  - make testall
+  - make checkall
 
 after_success:
   - coveralls --exclude util

ci/before_install_linux.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+## Enable ipv6 loopback only for testing
+# sudo /sbin/sysctl -w net.ipv6.conf.all.disable_ipv6=0
+# sudo /sbin/sysctl -w net.ipv6.conf.default.disable_ipv6=0
+sudo /sbin/sysctl -w net.ipv6.conf.lo.disable_ipv6=0
+ip addr

ci/before_install_osx.sh

@@ -0,0 +1,2 @@
+#!/bin/sh
+# NOOP