Case insensitive file handling is only active when
core.ignorecase = true. Hence, we need to set it to give the tests
in t0050 a chance to succeed. Setting core.ignorecase explicitly
allows to test some aspects of case handling even on case sensitive file
systems.
Signed-off-by: Steffen Prohaska <prohaska@zib.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>