WIP: [feat] add -h/--human parameter to dbex members

to print timestamps as a date.

this was actually coded by @librelois in a live session !

lib/core/core/cli/dbex.rs

@@ -76,6 +76,9 @@ pub struct MembersOpt {
     #[structopt(short = "e", long = "expire")]
     /// show members expire date
     pub expire: bool,
+    /// human readable output
+    #[structopt(short = "h", long = "human")]
+    pub human_readable: bool,
 }
 
 #[derive(StructOpt, Debug, Clone)]