Bug-22516: Moved notify() after variable update.
Bug-22452:
   1) Updated window size calculation on rollover to add 1 to account for rollover like with sequence number.
   2) Changed window size debug messages to be on one line instead of two
   3) Altered error message to use same local variable for test and debug output.
Bug-22452/Bug-22516: Update beepcore-java to version 0.9.19.