Add warning about known issues to documentation of cvsimport
Add warning about known issues to documentation of cvsimport

The described issues are compiled from the tests by Michael Haggerty and me.
Because it is not apparent that these can be fixed anytime soon at least warn
unwary users not to rely on the inbuilt cvsimport to much.

Signed-off-by: Heiko Voigt <86e258386154ed4b73b2a53bbe17a37214573109@hvoigt.net>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

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