* build/property-set.jam (refine-from-user-input): New,

	extracted from main-target-requirements, with extra
	code to handle "-<property>value" syntax.
	* build/targets.jam (main-target-requirements): Use
	the above.
	* build/project.jam (project-attributes.set): Likewise.


[SVN r35159]

tools/build

@@ -1 +1 @@
-Subproject commit 160c7c18e9c5f17ffa8ef362b64879597aac994b
+Subproject commit ec1e0896f0236d0f863fa5ad37966580644a2c91