Enable IPv6 in Docker container during CI

Author: trflynn89

build/ci/Makefile

@@ -59,6 +59,7 @@ run: build
 	$(Q)docker run -it \
 		--name $(REPO) \
 		--cap-add SYS_PTRACE \
+		--sysctl net.ipv6.conf.all.disable_ipv6=0 \
 		$(USER)/$(REPO):$(TAG)
 
 clean:

build/ci/linux.yml

@@ -11,7 +11,7 @@ jobs:
 
     container:
       image: trflynn89/libfly:ubuntu2010_clang11_gcc10
-      options: --cap-add SYS_PTRACE
+      options: --cap-add SYS_PTRACE --sysctl net.ipv6.conf.all.disable_ipv6=0
 
     steps:
     - template: setup.yml