Merge [58123], [58127], [58128] to release. Fixes #3666.

[SVN r58195]
Merge [58275], [58306] to release.

[SVN r58380]
Merge [58123], [58127], [58128] to release. Fixes #3666.

[SVN r58195]
Merge [58275], [58306] to release.

[SVN r58380]
Merge branch 'develop'
Add sp_typeinfo_test to test/Jamfile.v2.
Merge branch 'develop'