mingw: avoid const warning
mingw: avoid const warning

Fix const warnings in http-fetch.c and remote-curl.c main() where is
argv declared as const.

The fix should work for all future declarations of main, no matter
whether the second parameter's type is "char**", "const char**", or
"char *[]".

Signed-off-by: Stepan Kasal <257b363030caa50dbc1cdef9b268d9d56bf639f1@ucw.cz>
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