disable R2 support for chan_zap.so

[Caio Begotti]

Hi, what are the possibilities to disable the linking of R2 for the 
chan_zap.so module? I've Cc'ed the two latest uploaders of the asterisk 
package, so I'm sorry if it's the wrong way of doing it...

If it can be done, then people might use a separate package (that I've done) 
to use Unicall channels and MFC/R2 easily. Anyway, I don't know the impact of 
it for current Zap users, but I don't think it will blow stuff up, right?

PS: that's what I am talking about:

-	$(CC) $(SOLINK) -o $@ $<  $(ZAPPRI) $(ZAPR2) -ltonezone
+	$(CC) $(SOLINK) -o $@ $<  $(ZAPPRI) -ltonezone

PPS: it's necessary to make sure unicall will work/use the protocol MFC/R2 
written by Steve Underwood, thus necessary to my packages work out...

Regards,

-- 
Caio Begotti (caio1982)
http://caio.ueberalles.net