net/syncthing: update to 0.10.4


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@372130 35697150-7ecd-e111-bb59-0022644237b5
net/syncthing-discosrv: update to new snapshot

While here, use deps bundled with syncthing


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@372131 35697150-7ecd-e111-bb59-0022644237b5
net/syncthing-cli: update to new snapshot

While here, use deps bundled with syncthing as much as possible


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@372132 35697150-7ecd-e111-bb59-0022644237b5