Update doc/efun/ aus Driversourcen.
Manpages der efuns aktualisiert, neue Manpages hinzugefuegt.
Change-Id: I7cc91684269ff56d1aef47d5c5e7c87f7fd531dc
diff --git a/doc/efun/this_coroutine b/doc/efun/this_coroutine
new file mode 100644
index 0000000..1c57e26
--- /dev/null
+++ b/doc/efun/this_coroutine
@@ -0,0 +1,12 @@
+SYNOPSIS
+ coroutine this_coroutine()
+
+DESCRIPTION
+ Returns the innermost coroutine in the caller stack.
+ Returns 0 if there is no coroutine.
+
+HISTORY
+ Coroutines were introduced in LDMud 3.6.5.
+
+SEE ALSO
+ coroutines(LPC), call_coroutine(E)