sul: all timed objects use a single pt sul list

wsi timeout, wsi hrtimer, sequencer timeout and vh-protocol timer
all now participate on a single sorted us list.

The whole idea of polling wakes is thrown out, poll waits ignore the
timeout field and always use infinite timeouts.

Introduce a public api that can schedule its own callback from the event
loop with us resolution (usually ms is all the platform can do).

Upgrade timeouts and sequencer timeouts to also be able to use us resolution.

Introduce a prepared fakewsi in the pt, so we don't have to allocate
one on the heap when we need it.

Directly handle vh-protocol timer if LWS_MAX_SMP == 1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8465289..b7391d0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -219,6 +219,7 @@
 	set(LWS_WITH_HTTP_BROTLI 0)
 	set(LWS_WITH_POLL 0)
 	set(LWS_WITH_SEQUENCER 0)
+	set(LWS_ROLE_DBUS 0)
 endif()
 
 if (LWS_WITH_STRUCT_SQLITE3)
@@ -1281,6 +1282,7 @@
 				list(APPEND SOURCES lib/plat/esp32/esp32-helpers.c)
 			endif()
 		else()
+			set(LWS_PLAT_UNIX 1)
 			list(APPEND SOURCES
 				lib/plat/unix/unix-caps.c
 				lib/plat/unix/unix-file.c
@@ -1322,11 +1324,6 @@
 		lib/roles/http/server/rewrite.c)
 endif()
 
-if (LWS_WITH_NETWORK)
-	list(APPEND SOURCES
-		lib/event-libs/common.c)
-endif()
-
 if (LWS_WITH_POLL AND LWS_WITH_NETWORK)
 	list(APPEND SOURCES
 		lib/event-libs/poll/poll.c)