Update the manual to say that entry points for tiles is always present for...

Update the manual to say that entry points for tiles is always present for slices with multiple tiles

doc/software-manual.tex

@@ -1969,6 +1969,7 @@ be encoded or decoded using one or more cores.
 %\ShortOption{\None} &
 \Default{false} &
 Allow signalling of entry points for WPP in slice header.
+Note that when a slice contains more than one tile, entry point offsets for tile are always present in the slice header.
 \\
 
 \end{OptionTableNoShorthand}