man page: Fix hyphen vs minus sign

See http://lintian.debian.org/tags/hyphen-used-as-minus-sign.html for
details about the fixed issue.
man page: Add trailing slashes to hostname-only URLs
Debian package: Add support for xulrunner 27
Debian package: xulrunner packages switched from -xy.0 to -xy from xy=27 on
Debian package: Upload to Debian Unstable as 1.0~~pre+git131116-1
Debian package: Reformat debian/control in wrap-and-sort style
Debian package: Bump Standards-Version to 3.9.5
utils.js: whitespace
content-buffer.js: whitespace
buffer.js: whitespace
http-request-hook: new module

The http-request-hook module provides a means for the user to alter the
headers of HTTP requests, for purposes such as changing the user-agent
string based on the url being requested.