dhcp-server: T3982: dot (.) is an allowed static-mapping character
dhcp-server: T3982: dot (.) is an allowed static-mapping character

This reverts a part of commit c45e4beadf30accb1838b3bad1f21c2146469bf8.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x