New fomrula: gsasl

The gsasl package is a superset of libgsasl. Installing it provides the
gsasl libraries, the header files, a command line tool called gsasl to
access the library from the shell and the manual.

Closes #16428.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
insighttoolkit: add opencv bridge option

Closes #18229.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>