Should 'dashlength' affect only builtin or also custom dash patterns?

[Christoph B. <us...@be...>]

Hi,

I've seen, that different terminals handle the `dashlength` option  
differently:

set termoption dashlength 1
plot x dt 2, 2*x dt '.-'
pause -1

set termoption dashlength 3
replot


`qt`: dashlength affects only the custom dash pattern
`wxt`: both patterns are stretched
`post`: only the builtin patterns are affected

This behaviour should be equal for all terminals.

My suggestion is to have the dashlength option apply to all dash  
patterns. Especially for patterns of the kind `dt '.-'` it is very  
helpful to have the ability to change the basic unit of the patterns.

I wanted to discuss this before I submit any patches to sf.

Best regards,
Christoph