kiss-vm-ns v1.0 release

fix some bugs since v1.0-rc2

kiss-vm enable epel repo by default
kiss-vm enable restraint repo for rhel-8 by default
kiss-vm optimize --nvdimm options
kiss-vm add --enable-nested-vm option and example to start nested vm host
kiss-vm add --enable-cpuv option to enable CPU Virtualization on guest
kiss-vm support run vm exec $vm-created-by-others -- cmd without password
kiss-vm: add support fuzzy matching distro name
kiss-vm: improve to avoid user re-login after adding libvirt group

kiss-netns: umount all networking fs in ns before delete it
kiss-netns: add addbr() addif2bridge() to support auto create bridge
kiss-netns: use different tmux server for each netns

kiss-ns: re-write ns_init_pid() and ns_pstree() based on tmux list-panes and awk
kiss-ns: use defferent tmux server for each ns