Documentation: ice: Prepare documentation for RST conversion

Before making the conversion to the RST (reStructured Text) format, there
are changes needed to the documentation so that there are no build errors.

Also fixed old/broken URLs to the correct or updated URL.
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>

Documentation/networking/ice.txt

-Intel(R) Ethernet Connection E800 Series Linux Driver
+.. SPDX-License-Identifier: GPL-2.0+
+
+Linux* Base Driver for the Intel(R) Ethernet Connection E800 Series
 ===================================================================
 
 Intel ice Linux driver.
@@ -6,19 +8,19 @@ Copyright(c) 2018 Intel Corporation.
 
 Contents
 ========
+
 - Enabling the driver
 - Support
 
 The driver in this release supports Intel's E800 Series of products. For
-more information, visit Intel's support page at http://support.intel.com.
+more information, visit Intel's support page at https://support.intel.com.
 
 Enabling the driver
 ===================
-
 The driver is enabled via the standard kernel configuration system,
-using the make command:
+using the make command::
 
-     Make oldconfig/silentoldconfig/menuconfig/etc.
+  make oldconfig/silentoldconfig/menuconfig/etc.
 
 The driver is located in the menu structure at:
 
@@ -30,10 +32,14 @@ The driver is located in the menu structure at:
 
 Support
 =======
-
 For general information, go to the Intel support website at:
 
-    http://support.intel.com
+https://www.intel.com/support/
+
+or the Intel Wired Networking project hosted by Sourceforge at:
+
+https://sourceforge.net/projects/e1000
 
-If an issue is identified with the released source code, please email
-the maintainer listed in the MAINTAINERS file.
+If an issue is identified with the released source code on a supported kernel
+with a supported adapter, email the specific information related to the issue
+to e1000-devel@lists.sf.net.