Escape arguments when relinquishing a DHCP lease. Fixes #8843
(cherry picked from commit 57183ac45c0bfd5acf92c99e30c52bb2ca9417f9)
Escape arguments when relinquishing a DHCP lease. Fixes #8843
(cherry picked from commit 57183ac45c0bfd5acf92c99e30c52bb2ca9417f9)