Simplify the upstart example in host_integration.rst

Taking some pointers from @tianon on my pull request #2685.
Lintify code with confidence=1
Correct the quotations in the command to add the -r=false flag.  Thanks to @tianon for pointing this out.
fixed typos, and made small improvements to the wording
Switch sphinx man_pages generation to use commandline/cli instead of toctree for a more relevant/useful man page
Fix quote mistake.
Merge pull request #2766 from sbellem/doc-improvements

fixed typos, and made small improvements to the wording
Merge pull request #2770 from tianon/better-man-page

Switch sphinx man_pages generation to use commandline/cli
Merge pull request #2757 from Painted-Fox/patch-2

Simplify the upstart example in host_integration.rst
Merge pull request #2759 from dotcloud/lintify-1

Lintify code with confidence=1