pgsql: Attached patch cleans up the HTML code in tools/backend.

Log Message:
-----------
Attached patch cleans up the HTML code in tools/backend. This is
required for us to pull it into the main website. Same kind of fixes as
last time, just make sure things aren't violating the HTML standard. No
context changes at all.

Magnus Hagander

Modified Files:
--------------
pgsql/src/tools/backend:
backend_dirs.html (r1.4 -> r1.5)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/backend/backend_dirs.html.diff?r1=1.4&r2=1.5)
index.html (r1.28 -> r1.29)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/tools/backend/index.html.diff?r1=1.28&r2=1.29)