explain default options and provide more details

[pas-calc]

Is your feature request related to a problem? Please describe. the manpage (man redshift) does not explain that the default method for location is geoclue2 ,

Describe the solution you'd like please add this information referring to methods (location providers ) redshift -l list alternatively add an default sample config file in ~/.config/redshift.conf as described here

Describe alternatives you've considered provide a sample config file

Additional context default options should always be mentioned in the man page or a default config file should be created

[johnchristopher]

I'd also appreciate an explanation of the lat/lon format to use.

edit: found interesting info in this gist: https://gist.github.com/bcomnes/4243805