Log failed accesses to /dev/vcsa so they appear by default about fenrir

[chrys87]

not sure if i want to speak every error.
i can add an -D (capital d) to let fenrir speak the error messages too.
i would not exit because on many systems only VCSA1 - 6 exists (on 7 is typical X11). but if there is no X and you switch to TTY7 it will just error out and stop then. this is not wanted. i still want fenrir want to work if you switch to an other TTY (where the VCSA file exist for or you have read access).

[chrys87]

currently fenrir needs for daemon mode on many systems root. i wanted to changes this in future.

[ndarilek]

To be clear, I don't mean speak the error, but print it to the screen. I understand that in many cases these are the same. However, in this instance where Fenrir fails to open up /dev/vcsa6 because of a permissions error, I get absolutely nothing until I enable debug logging. In that instance, I think it makes sense to tell the user that the screen reader is in fact working fine, they just don't have the correct permissions set up. Thanks.

[chrys87]

Print them always on screen is an bad idea. since the errors can flood the screen with a lot of text (and events, what are fenrir ties to process), That flood can result in creating new debug messages what increases the number of events exponentially (what is a recursion to death ;) ).
there is a -p flag to print issues on the screen. by default fenrir only logs to file to prevent from that recursion.