src/config.c: Remove map for configuration variables
src/config.c: Remove map for configuration variables

This patch kind of reverts what we did in commit
6377582841118688aee13aff98c9216403582e45. We were a tad off-base there
since using a map doesn't improve maintainability, really. Using
strcmp() at a central location seems perfectly fine and doesn't have the
overhead of the map scanning algorithm.

Signed-off-by: Lukas Fleischer <af90e31281d8305af43dc616c5aaca3c7165f8a7@cryptocrack.de>

lfos/calcurse,lfos/calcurse,lfos/calcurse