haproxy_ctld_daemon.rb: Fix backtrace option

The haproxy_ctld_daemon.rb script in the haproxy cartridge had a typo:
':backgrace' instead of ':backtrace'.

This typo appears to have been present since haproxy_ctld_daemon.rb was
introduced in commit ee8cebbe1adb351a3b80ca3fda4f047aee8fac1b.
process_templates need to be String literals
bin/* needs to be executable
Mention EOL chacacters
Mention chmod.
Add Windows-friendly instructions
Application's action hooks follow the same semantics as cartridge control scripts
A typo
Add sections for readability
Minor tweak in wording
Merge pull request #3127 from rmillner/misc_bugs

Merged by openshift-bot
<oo-stats> splitting into first admin library class
<admin-console> reuse admin stats library
Merge pull request #3128 from sosiouxme/admin-console-stats

Merged by openshift-bot
Added system architecture guide
Added equivalent Fedora commands when they are different than RHEL ones
Added 'under construction' note to VM deployment guide
Remove unnecessary meta tag
Merge pull request #3130 from nhr/updates

Merged by openshift-bot
Allow plugin carts to reside either on web-framework or non web-framework carts.
HA-proxy cart manifest will say it will reside with web-framework (earlier it was done in the reverse order).