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

use ss_resolve_t and ss_revolve_svtree to find the configuration file instead of reading directly the sysadm configuration directory. Help user with a good help message in case of sudo command