hygiene, move ical specific printing routines to evical.c

Signed-off-by: Sebastian Freundt <hroptatyr@fresse.org>
major, allow one-per-line format in echse(1) select via --format

Signed-off-by: Sebastian Freundt <hroptatyr@fresse.org>
test, add regression test file for ical output of echse(1) select

Signed-off-by: Sebastian Freundt <hroptatyr@fresse.org>
Merge branch 'cmd/select'

* cmd/select:
  test, add regression test file for ical output of echse(1) select
  major, allow one-per-line format in echse(1) select via --format
  hygiene, move ical specific printing routines to evical.c