Add list factoids function

Thanks to bill-auger for this function from pbot-ng which works also in hyperbot

process_event

@@ -321,6 +321,22 @@ function process_event
 	    # factoids #
             ############
 
+            # list factoids
+            ',' | ',list' | ',factoids' | "${my_own_name}: list factoids" )
+                local factoids=( $(ls info/) )
+                local n_factoids=${#factoids[*]}
+                local begin_msg="ask me about:"
+                local end_msg="e.g. ${server_nick_current}: what is ${factoids[0]} (or ,${factoids[0]})"
+
+                send_msg "${personoslash}" "${begin_msg}"
+                for (( factoid_n = 0 ; factoid_n < n_factoids ; factoid_n = factoid_n      10 ))
+                do  send_msg "${personoslash}" "    ${factoids[*]:${factoid_n}:10}"
+                    sleep 1
+                done
+                send_msg "${personoslash}" "${end_msg}"
+                ;;
+
+            # set factoid
             "${my_own_name}: "+([!/])" is "+([![:space:]])* )
                 declare -l thing="${sentence#${my_own_name}: }"
                 thing="${thing%% is *}"
@@ -349,6 +365,8 @@ function process_event
 
                 forget_fact
                 ;;
+
+            # display factoid
             ','+([!/]) )
                 thing="${sentence#,}"