Revert "Bugfix: don't exclude parentheses from org-plain-link-re."

This reverts commit c80e212d57941c170d76dc4986d3605f55899679.

Conflicts:

	lisp/ChangeLog

lisp/org.el

@@ -4071,7 +4071,7 @@ This should be called after the variable `org-link-types' has changed."
 	org-plain-link-re
 	(concat
 	 "\\<\\(" (mapconcat 'identity org-link-types "\\|") "\\):"
-	 "\\([^]\t\n\r<> ]+[^]\t\n\r<>,.; ]\\)")
+	 "\\([^]\t\n\r<>() ]+[^]\t\n\r<>,.;() ]\\)")
 	org-bracket-link-regexp
 	"\\[\\[\\([^][]+\\)\\]\\(\\[\\([^][]+\\)\\]\\)?\\]"
 	org-bracket-link-analytic-regexp