[rct] Show UTC in footer 1.0.1

[color=rgb(40,40,40)][font=helvetica][size=3]This simple hook amends the board footer to add the display of the UTC (Coordinated Universal Time) after the member's local time. Because it makes the board footer wider, it also adds a line break.[/size][/font][/color]
[color=rgb(40,40,40)][font=helvetica][size=3] [/size][/font][/color]
[color=rgb(40,40,40)][font=helvetica][size=3](The Board footer is only displayed if you switch on Debug Level 1 or higher in your AdminCP)[/size][/font][/color]
[color=rgb(40,40,40)][font=helvetica][size=3] [/size][/font][/color]
[color=rgb(40,40,40)][font=helvetica][size=3]For IP.Board v3.3.x upwards. Not compatible with 3.2.3 or below.[/size][/font][/color]