Add structure-ext per #1759

quicklisp · quicklisp · commit 094b6dee99fe · 2020-05-30T14:33:18.000-04:00
diff --git a/projects/structure-ext/source.txt b/projects/structure-ext/source.txt
@@ -0,0 +1 @@
+git https://github.com/hyotang666/structure-ext.git

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+git https://github.com/hyotang666/structure-ext.git`