remove _GNU_SOURCE definition when including unistd.h for environ variable

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
docs: escape a backslash with a backslash

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
introduce trashbox, a replacement of trash

When using trash API, the value returned from functions of API
must be reassgined to trash variable.

e.g.

	trash = trashPutFull(trash, item, eFree);

This API may lead programming error.
So new interface trashBox is introduced in this patch.
trashbox manages its state  internally. above trashPut example
can be replaced with following code:

    trashBoxPut(trash_box, item, eFree);

No value is returnd from trashBoxPut.
Internal state of trash_box is updated with this invocation.

trashBox must be dynamically allocated. This is a bit inefficient
in a case. However, you can put a trashbox to a trashbox:

   trasBoxPut(trash_box, local_trash_box, trashBoxDestroy);

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
random hacking: enable fnmatch in mk_mvc.mak

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Deleted mention about patch. The problem was fixed with f4ad98b
use _NSGetEnviron to traverse environment variables on macosx

This solves #93 reported by @lastobelus and @kopischke.
This is tested by @kopischke.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
fix a typo in comment

Signed-off-by: Masatake YAMATO <yamato@redhat.com>