Fix a bunch of PDF generation bugs in the texi:

 * The "overfull" warnings are basically complaints about lines
   that are too long, so they ran off the right margin of the
   PDF documentation and turn into a "black blot".

 * The "underfull" warnings are basically complaints about lines
   that look ugly when they get filled, because the tokens are
   so long that the line-break algorithm can't do anything good.

In a few cases the simplest fix seemed to be to use more appropriate
texi commands.

In other cases the fix was a content bugfix:  "ocd_" not "openocd_";
and many of those "target variants" actually aren't recognized.


git-svn-id: svn://svn.berlios.de/openocd/trunk@1936 b42882b7-edfa-0310-969c-e2dbd0fdcd60