7fde049250a05b2804e5674676d84d0bcbbbf7b9
markd
  Thu Feb 13 16:31:55 2020 -0800
added documentation on cart.* variables

diff --git src/product/ex.hg.conf src/product/ex.hg.conf
index 9df4a0b..087afbe 100644
--- src/product/ex.hg.conf
+++ src/product/ex.hg.conf
@@ -271,39 +271,52 @@
 #	The central.domain will allow the browser cookie-cart
 #	function to work.  Set it to the domain of your Apache
 #	WEB server.  For example, if your browser URL is:
 #	http://mylab.university.edu/cgi-bin/hgTracks?db=hg19
 #	set central.domain to: mylab.university.edu
 #	An exception to this is when multiple virtual hosts share the
 #	same central database and central.cookie setting (see below).
 #	In #that case, domain should be inclusive of all virtual hosts
 #	(e.g. only #.university.edu).
 #       The special value HTTPHOST will set the domain to whatever
 #       servername was sent with the last HTTP request. This allows cookies
 #       to work if a server has multiple names.
 central.user=readwrite
 central.password=update
 central.domain=mylab.university.edu
+
 # use this cookie setting to keep your installation hguid cookie setting
 #	distinct from UCSC hguid cookie.  If you have *multiple* central
 #	databases for multiple hosts, set a distinct cookie name per
 #	central database.
 # central.cookie=hguid.mylab
+
+# Configuratuion database containing cart tables.  Normally thest in in the
+# 	same database as central.db, however can be overriden with these
+# 	variables if needed.  If any of these are set, all must be set.
+# cart.db=
+# cart.host=
+# cart.user=
+# cart.password=
+
+
+
 #	personalize the background of the browser with a specified jpg
 #	floret.jpg is the standard UCSC default
 browser.background=../images/floret.jpg
 
+
 # Change this default documentRoot if different in your installation,
 #	to allow some of the browser cgi binaries to find help text files
 browser.documentRoot=/usr/local/apache/htdocs
 #	personalize the background of CGIs that don't use images
 #browser.bgcolor=FFF9D2
 
 # optional location of grepIndex files
 grepIndex.genbank=/data/tmp/grepIndex
 grepIndex.default=/gbdb
 
 #  new option for track reording functions, August 2006
 hgTracks.trackReordering=on
 #	in case of failure of the above central.host machine,
 #	the following settings will be used to access a secondary
 #	mirror of the database