Add group option

[hocineait7]

No description provided.

[LeChatP]

Need a few tests :
When: -g g1,g2; add: g1,g2 -> expected result: invalid (as -g is AND, and add: g1,g2 is OR)
When: -g g1; add: [g1,g2] -> expected result: invalid (must be strictly equal)
When: -g g1,g2; add: [g1] -> expected result: invalid (must be strictly equal)
When -g g1,g2; add: [g1,g3] -> expected result: invalid (must be strictly equal)