[Courier-imap] New courier development builds

[Sam V. <mr...@co...>]

Download: https://www.courier-mta.org/download.html

New development build of courier-sox, courier-authlib, courier, courier- 
imap, sqwebmail, maildrop, and cone packages.

Changes:

- code changes so that courier can be compiled with -Wall -Werror gcc flags.  
The default compilation flags are not changed. This also includes changes to  
the configuration scripts, which includes removing outdated configuration  
settings.

- fix configuration scripts' --with-certsdir option.