allows @runas field to be on format uid:gid,uid:,:gid or uid whereas uid and gid is the name of user and the name of the group respectively

add %RUNAS% feature: allow to choose the place where write the s6-setuidgid command at execute field

Update NEWS.md

See merge request Obarun/66!53

Should *resolve* files be defined somewhere?  Where?

add -c,-s,-V,-i options: -c change the symlink to target to the specified version. -s handle a specific version for command -L|V|e|r. -V displays available version. -i import extra configuration file from a version to another