multimarkdown 4.4.2

Closes #25744.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
zsh: use SourceForge as primary download host

Closes #25748.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
libssh 0.6.0

Closes #25753.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>