builtin-init-db: spell the in-program configuration variable in lowercase.
builtin-init-db: spell the in-program configuration variable in lowercase.

Just for consistency -- setup.c spells it in lowercase.

Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git