src/product/README.building.source 1.18

Index: src/product/README.building.source
===================================================================
RCS file: /projects/compbio/cvsroot/kent/src/product/README.building.source,v
retrieving revision 1.17
retrieving revision 1.18
diff -b -B -U 4 -r1.17 -r1.18
--- src/product/README.building.source	30 Oct 2009 21:38:14 -0000	1.17
+++ src/product/README.building.source	6 Nov 2009 18:44:51 -0000	1.18
@@ -66,8 +66,23 @@
 	will display the appropriate MYSQLINC directory.
 	The -lz requires a link to the libraries installed in the
 	zlib-devel rpm.
 
+4a. optional SSL support:
+	If you want the libraries to be able to use SSL,
+	for instance to support fetching HTTPS URLs,
+	install openssl.  We are currently using these packages: 
+	openssl-0.9.8b-10.el5
+	openssl-devel-0.9.8b-10.el5
+        Add the following as an environment variable to 
+        .bashrc or .tcshrc, OR alternatively add it as the first
+	line of your kent/src/inc/common.mk:
+	  USE_SSL=1
+        If you try to fetch an https url without this support
+	you will see an error message:
+	  No openssl available in netMustConnectHttps for <hostName> : <port>
+        SSL is also useful for accessing bigWig and bigBed over HTTPS.
+
 4.  In the source tree, perform the following:
 	$ cd kent/src
 	$ make libs
 	At this point, you can build utilities in other parts of