+1276. [build] tmark
+ The configure script now configures the build to require the Boost
+ system library (boost_system) by default. The library must be
+ installed and you may need to specify "--with-boost-lib-dir=<path>".
+ Prior to this the default was to attempt to build Boost with headers
+ only. Building with headers only may still be done, though it is
+ strongly discouraged, by specifying "--enable-boost-headers-only".
+ (Trac #5215, git b6f1ee0d1210e35631369fc697c76cc3cf2c4130)
+
1275. [func] marcin
LibraryHandle obbject can now be used to register handlers
for the control commands in a hook library.