Fix some compiler warnings from Clang.
Fix spelling in version history #4294
Docs for my_popen() reaping child process on failure. #4026
fix LaTeX errors that only showed themselves in the pdf. 1. Spelling
error of Chapter TWELV that has been in the manual since 1998! 2. A table
that floated itself to the end, sweeping all other subsequent tables with it.
Merge branch 'V8_0-branch' into V8_1_5-branch
Merge branch 'V8_1_5-branch'