chinese/libtabe: Unbreak fetch (slightly different distfile)

I don't know why, but the other repositories use a version of libtabe
that's about 5 days newer, although both are listed as version 0.2.6.
Apparently it was re-rolled about 11 years ago. A patch had to be
regenerated as a result. I reviewed differences between the two tarballs
and everything was innocent (a good chunk of different was html
documentation in chinese.

The DEBIAN_POOL magic doesn't support libraries, so MASTER_SITE_DEBIAN
had to be manually tweaked to use the Debian pool.

While here, clean up the X11 option a bit and wrap lines at 80 columns.