Hello,

This little audit fixes a number of problems in the current doco:

- gdbint.texinfo and stabs.texinfo didn't have correct invariant statements

- stabs.texinfo didn't include the FDL

- a stray @bye in agentexpr.texi caused the main manual to loose several 
appendixes and the index :-(

- s/annotate.html/annotate_toc.html/.

ok, 6.0?

Andrew