un-fork github.com/spf13/pflag IPNetSliceValue

[thaJeztah]

Pull request #1233 switch the pflag package to a temporary fork, waiting for spf13/pflag#170 to be merged upstream #1233 (comment)

cli/vendor.conf

Lines 75 to 76 in c67e057

	# temporary fork with https://github.com/spf13/pflag/pull/170 applied, which isn't merged yet upstream
	github.com/spf13/pflag 4cb166e4f25ac4e8016a3595bbf7ea2e9aa85a2c https://github.com/thaJeztah/pflag.git

We should try to get spf13/pflag#170 reviewed and merged upstream, so that we can get rid of the fork

/cc @selansen

[thaJeztah]

Fork was removed in #2487, but by copying the IPNetSliceValue locally; ideally we would remove that once spf13/pflag does a new release with spf13/pflag#170 to be included