botcha 6.x-1.8

[#5308708] Added autocomplete=off to avoid false detects with client's autocomplete
[NOISSUE] Coder style fixes
[NOISSUE] Reworded "Form session reuse detected" message, added "Please try again..."
[NOISSUE] Backported secret key generation cleanup from 7.x-1.x-dev
[NOISSUE] Refactoring: Allow named recipe books other than 'default'; Use form_state to pass '#botcha' value
[NOISSUE] Remove Captcha integration text from help if Captcha module is not present
[NOISSUE] Remove hole in user_login_block protection when accessed via /admin/ path
[NOISSUE] Reworked _form_alter and _form_validate workings to allow clean reset of default values
[NOISSUE] Added simple honeypot recipe suitable for simpletest (no JS)
#1075722: Re-login problem on multilingual site; Compatibility with Pressflow Backport D7 session handling to D6
[NOISSUE] Added simpletest test cases
[NOISSUE] Fixed warning in rules integration