Since we are using the clock_* functions from <time.h>, we now require the GNU C library version 2.17 or later (released in 2012), where linking to librt is no longer required in order to use the clock_* functions from <time.h>. This enables us to remove an otherwise unnecessary link to librt.
* INSTALL (Mandos Client): Document new GNU C library version requirement. * Makefile (plugins.d/mandos-client): Remove "-lrt".