Defaulting to no color for output

[sarcasticadmin]

I wanted to discuss the idea of default to no color -t 0 for direwolf. This way direwolf has a sensible default that "just works" across the board. Users can then explicitly set which colors that best fit their output needs via the -t flag. I found the current default output -t 1 a surprise when it was a white background + colors on my black background terminal, and I assumed that something was wrong with my build/configuration/environment.

It looks like this has been somewhat of an ongoing discussion:

• direwolf/src/textcolor.c

  Lines 43 to 80 in de293a1

  	>>>> READ THIS PART!!! <<<<
  	*
  	*
  	* Problem: Years ago, when I started on this...
  	*
  	* The ANSI escape sequences, used for text colors, allowed 8 basic colors.
  	* Unfortunately, white is not one of them. We only have dark
  	* white, also known as light gray. To get brighter colors,
  	* we need to apply an attribute. On some systems, the bold
  	* attribute produces a brighter color rather than a bold font.
  	* On other systems, we need to use the blink attribute to get
  	* bright colors, including white. However on others, blink
  	* does actually produce blinking characters.
  	*
  	* Previously, the only option was to put "-t 0" on the command
  	* line to disable all text color. This is more readable but
  	* makes it harder to distinguish different types of
  	* information, e.g. received packets vs. error messages.
  	*
  	* A few people have suggested ncurses.
  	* I looked at ncurses, and it doesn't seem to be the solution.
  	* It always sends the same color control codes rather than
  	* detecting the terminal type and adjusting its behavior.
  	*
  	* Version 1.6:
  	*
  	* For a long time, there was a compile time distinction between
  	* ARM (e.g. Raspberry Pi) and other platforms. With the arrival
  	* of Raspbian Buster, we get flashing and the general Linux settings
  	* work better.
  	*
  	* Since there doesn't seem to be a single universal solution,
  	* the text color option will now be allowed to have multiple values.
  	* Several people have also complained that bright green is
  	* very hard to read against a light background so only dark green will be used.
  	*
  	*--------------------------------------------------------------------*/

• Direwolf does not respect user's terminal background colour #477
• Direwolf terminal blinking. #270
• Please allow disabling of terminal colors #247
• Text and window color preferences don't stick #108

[sarcasticadmin]

Closing per comment #495 (comment)