$NetBSD$

Support NetBSD.

--- src/daemon/CMakeLists.txt.orig	2020-11-03 09:47:51.000000000 +0000
+++ src/daemon/CMakeLists.txt
@@ -35,6 +35,8 @@ set(DAEMON_SOURCES
 # (where the FreeBSD version does nothing).
 if(${CMAKE_SYSTEM} MATCHES "FreeBSD")
     list(APPEND DAEMON_SOURCES ${CMAKE_SOURCE_DIR}/src/common/VirtualTerminal_FreeBSD.cpp)
+elseif(${CMAKE_SYSTEM} MATCHES "NetBSD")
+    list(APPEND DAEMON_SOURCES ${CMAKE_SOURCE_DIR}/src/common/VirtualTerminal_NetBSD.cpp)
 else()
     list(APPEND DAEMON_SOURCES ${CMAKE_SOURCE_DIR}/src/common/VirtualTerminal.cpp)
 endif()