fix some pastographical errors

git-svn-id: file:///home/svn/framework3/trunk@8790 4d416f70-5f16-0410-b530-b9f4589650da

lib/msf/core/session/provider/single_command_shell.rb

@@ -27,14 +27,14 @@ module SingleCommandShell
 	#
 	# Writes data to the command shell.
 	#
-	def shell_read(buf)
+	def shell_write(buf)
 		raise NotImplementedError
 	end
 
 	#
 	# Closes the command shell.
 	#
-	def shell_read()
+	def shell_close()
 		raise NotImplementedError
 	end
 
@@ -42,4 +42,4 @@ end
 
 end
 end
-end
+end