Rename function TYPED-OPTONALS to OPTIONALS-FIRST and move its definition
to the only module that uses it: sxml.scm
Use LET-OPTIONALS instead of OPTIONALS, as it does the job, too, and
it ensures that the meaning of an argument depends only on its
position and not on the amount of arguments in front of it.
This commit removes a pitfall in calls to MAKE-TEXTAREA.
Nearly every example SUrflet continues to work unchanged, except of one
line in admin-surflets.scm, thus updating it.
f972598f59