[NetBehaviour] patch for re_store_present*

[james morris]

Here's a patch attached which adds minor additional functionality to the
re_store_present* scripts posted here today.

for the following scripts:

re_store_present2
re_store_present3
re_store_present4
re_store_present5b

the patch adds the command line argument -width n  where n is a custom
width you wish to trim to. adds glitchymess if n > terminal width.

ie ./re_store_present3 -width 85

for the following scripts:

re_store_present4
re_store_present5b

the patch also adds a second command line argument -glitch where if
specified, the escape sequence to erase characters left from the last
v-scroll is replaced with "xxxx". the escape sequence itself has also
been modified to work on the amd64 platform where it appeared to not
work - don't know if this breaks things for x86 though.

-james
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