[Asterisk-bsd] assorted chan_oss.c fixes

[Luigi Rizzo]

first of all apologies for the cross-post, i know it is bad practice but
sometimes it is necessry because something is relevant in multiple
forums. I believe this is such a case.

I have posted a rather large set of changes to chan_oss.c
which were primarily ment to fix OSS behaviour in the FreeBSD
port of 1.07, but probably do help for Linux and HEAD as well.
See all the discussion and the patches at

	http://bugs.digium.com/bug_view_page.php?bug_id=0004108

i'd be grateful if someone could try these changes on other
platforms (FreeBSD 4.11/ asterisk 1.07) than the one I am using,
and provide feedback.

	cheers
	luigi