[sqwebmail] New developmer releases of all Courier packages

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

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

New development builds of all packages.

Changes:

- all: add build scripts that create installable deb packages, directly from  
source .tar.bz2 files, similar to how rpm packages get built. This was  
implemented on Ubuntu 20 and may or may not work on other Debian-derived  
distributions (the most likely determining factor is going to be names of  
build requirements). The instructions are found in each package's INSTALL  
and are mostly the same for all packages.

- sysconftool: add sysconftoolize man page, clean up the hierarchy, eliminating
the docbook symlink.

- sqwebmail: remove duplicate manpages from standalone sqwebmail install.

- courier-imap: fix csh profile script's adjustment of env variables. Fix  
RPM packages' installation script to automatically create temporary self- 
signed certs.

- courier-authlib: remove obsolete configure script code for migrating from  
pre-courier-authlib versions of courier packages. Remove obsolete userdb- 
test-md5 script.

- courier: remove obsolete initialization of /etc/courier/userdb*, this was  
moved to courier-authlib. Replace the webadmin suid binary with a socket- 
based daemon, like sqwebmail.

- courier-analog: add --journal option to read logs from the system journal.

Other changes since the last release:

- courier: Removed fixed uid and gid values that get determined at compile  
time and baked into Courier. courier/mail's uid and gid gets looked up at  
runtime, with minimal cost.

- courier: Fix obscure SASL authentication breakage.

- courier, courier-imap: Additional internal automated tests.