[PATCH] - grammar and typo fixes for the httpc module man page

[Filipe David Manana]

The following patch fixes a few grammar errors and typos in the httpc
module man page:

git  fetch  git://github.com/fdmanana/otp.git  httpc_man_page_fixes

best regards,

-- 
Filipe David Manana,
fdmanana@REDACTED, fdmanana@REDACTED

"Reasonable men adapt themselves to the world.
 Unreasonable men adapt the world to themselves.
 That's why all progress depends on unreasonable men."