Pretty print multipath routes.

Pretty print multipath routes.

Before (backslash in c syntax meaning):
 6  p16-2-0-0.r21.sttlwa01.us.bb.verio.net (129.250.2.180)  71.027 ms \
p16-1-1-3.r20.sttlwa01.us.bb.verio.net (129.250.2.6)  66.730 ms  66.535 ms
 7  xe-0-2-0.r20.sttlwa01.us.bb.verio.net (129.250.4.16)  71.092 ms \
xe-3-1.r00.sttlwa01.us.bb.verio.net (129.250.2.205)  66.598 ms \
xe-0-2-0.r20.sttlwa01.us.bb.verio.net (129.250.4.16)  71.024 ms

After:
 6  p16-2-0-0.r21.sttlwa01.us.bb.verio.net (129.250.2.180)  71.027 ms
    p16-1-1-3.r20.sttlwa01.us.bb.verio.net (129.250.2.6)  66.730 ms  66.535 ms
 7  xe-0-2-0.r20.sttlwa01.us.bb.verio.net (129.250.4.16)  71.092 ms
    xe-3-1.r00.sttlwa01.us.bb.verio.net (129.250.2.205)  66.598 ms
    xe-0-2-0.r20.sttlwa01.us.bb.verio.net (129.250.4.16)  71.024 ms

Submitted by:	Richard A Steenbergen <ras at e-gerbil.net>
MFC after:	3 days