Update doc/efun/ aus Driversourcen.

Manpages der efuns aktualisiert, neue Manpages hinzugefuegt.

Change-Id: I7cc91684269ff56d1aef47d5c5e7c87f7fd531dc
diff --git a/doc/efun/coroutinep b/doc/efun/coroutinep
new file mode 100644
index 0000000..373d218
--- /dev/null
+++ b/doc/efun/coroutinep
@@ -0,0 +1,13 @@
+SYNOPSIS
+        int coroutinep(mixed arg)
+
+DESCRIPTION
+        Returns 1 if the argument is a coroutine.
+
+HISTORY
+        Introduced in LDMud 3.6.5.
+
+SEE ALSO
+        bytesp(E), clonep(E), closurep(E), floatp(E), intp(E), lpctypep(E),
+        lwobjectp(E), mappingp(E), objectp(E), pointerp(E), referencep(E),
+        stringp(E), structp(E), symbolp(E)