[PATCH] simple self contained pure ASCII example for v.segment

[jidanni]

Please add this 100% self contained pure ASCII example to v.segment man page. Thanks! In fact it perhaps should be example 1.

Example: Make points at 10, 20 meters:
v.in.lines -z input=- output=abc <<EOF
0|0|0
100|100|100
EOF
v.segment input=abc out=abc1 <<EOF
P 10 1 10
P 20 1 20
EOF
v.out.ascii input=abc1 precision=1
5.8|5.8|5.8|10
11.5|11.5|11.5|20