Merge pull request #6637
95acf3c remove $(@F) and subdirs from univalue make (Jonas Schnelli)
9623e93 [Univalue] add univalue over subtree (Jonas Schnelli)
2f9f082 Squashed 'src/univalue/' content from commit 87d9045 (Jonas Schnelli)
0917306 remove univalue, prepare for subtree (Jonas Schnelli)