Help for FFLAGS:

The FFLAGS command allows an oper to force a flags
change on a channel. The syntax is the same as FLAGS,
except that the target and flags changes must be given.
Viewing any channel's access list is done with FLAGS.

Syntax: FFLAGS <#channel> <nickname|hostmask> <template>
Syntax: FFLAGS <#channel> <nickname|hostmask> <flag_changes>

Examples:
    /msg &nick& FFLAGS #foo foo AOP
