revert: add transaction processing chapter with internals info

This doc patch (master hash 66bc9d2d3e) was decided to be too
significant for backpatching, so reverted in all but master.  Also fix
SGML file header comment in master.

Reported-by:  	Peter Eisentraut
Discussion: https://postgr.es/m/c6304b19-6ff7-f3af-0148-cf7aa7e2fbfd@enterprisedb.com

Backpatch-through: 11

diff --git a/doc/src/sgml/xact.sgml b/doc/src/sgml/xact.sgml
index c0f4993a0dfc2d3a0c84541fdcc20296c3be4895..b467660eeec15b84ef3833510f42d38d74c70bc4 100644 (file)
--- a/doc/src/sgml/xact.sgml
+++ b/doc/src/sgml/xact.sgml
@@ -1,4 +1,4 @@
-<!-- doc/src/sgml/mvcc.sgml -->
+<!-- doc/src/sgml/xact.sgml -->
 
 <chapter id="transactions">