[sqwebmail] Development builds of Courier packages available

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

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

20260130 builds of courier, sqwebmail, and maildrop packages are available  
for download.

Changes:

• mailbot: fix non-plain text autoreplies, removing a broken error message,  
a bonus. Using -m automatically implies -N and everything works out just  
right. Use POSIX exit codes for errors, to fix some issues when invoking  
mailbot from maildrop's .mailfilter

* reformime: handle "binary" transfer encoding analogous to 8bit handling.

* sqwebmail: update to use the new C++ MIME parsing libraries. Fixes to  
autoreplies: when editing mail filters peek at the autoreply content, and  
block non-functional DSN and non-quoting autoreply options when the  
autoreply content was uploaded as a non text-plain message.