make it clear that STARPU_WATCHDOG_TIMEOUT only doesn't crash the application

doc/doxygen/chapters/05check_list_performance.doxy

@@ -106,7 +106,7 @@ driver, etc.
 <c>export STARPU_WATCHDOG_TIMEOUT=10000</c> (\ref STARPU_WATCHDOG_TIMEOUT)
 
 allows to make StarPU print an error message whenever StarPU does not terminate
-any task for 10ms. In addition to that,
+any task for 10ms, but lets the application continue normally. In addition to that,
 
 <c>export STARPU_WATCHDOG_CRASH=1</c> (\ref STARPU_WATCHDOG_CRASH)
 

doc/doxygen/chapters/40environment_variables.doxy

@@ -771,7 +771,8 @@ end of the execution of an application (\ref DataStatistics).
 \anchor STARPU_WATCHDOG_TIMEOUT
 \addindex __env__STARPU_WATCHDOG_TIMEOUT
 When set to a value other than 0, allows to make StarPU print an error
-message whenever StarPU does not terminate any task for the given time (in µs). Should
+message whenever StarPU does not terminate any task for the given time (in µs),
+but lets the application continue normally. Should
 be used in combination with \ref STARPU_WATCHDOG_CRASH (see \ref
 DetectionStuckConditions).
 </dd>