Merged from trunk 4905:4912 a colourful set of patches

Merged from trunk 4905:4912 a colourful set of patches

Implement --color < y | n > for bug #42115 and deprecate --nocolor.
When --color is not specified, rely on the old NOCOLOR variable and/or
stdout auto-detection.

Document the new --color < y | n > option for bug #42115.

Add --color < y | n > help output for bug #42115.

Remove broken nocolor() call, since thats handled internally by the
output module anyway.

Fix the USE_ORDER docs for bug #153764.  Thanks to Alec Warner for the
initial patch.

svn path=/main/branches/prefix/; revision=4914