pgsql: Escape < and & in SGML

Escape < and & in SGML

This is not required in SGML, but will be in XML, so this is a step to
prepare for the conversion to XML. (It is still not required to escape
>, but we did it here in some cases for symmetry.)

Add a command-line option to osx/onsgmls calls to warn about unescaped
occurrences in the future.

Author: Alexander Law <exclusion(at)gmail(dot)com>
Author: Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/1c53f612bc8c9dbf97aa5a29910654a66dcdd307

Modified Files
--------------
doc/src/sgml/Makefile | 9 ++++++---
doc/src/sgml/array.sgml | 2 +-
doc/src/sgml/fdwhandler.sgml | 6 +++---
doc/src/sgml/plpgsql.sgml | 4 ++--
doc/src/sgml/ref/alter_operator.sgml | 4 ++--
doc/src/sgml/ref/create_view.sgml | 2 +-
doc/src/sgml/ref/pgtesttiming.sgml | 12 ++++++------
doc/src/sgml/release-8.4.sgml | 2 +-
doc/src/sgml/release-9.0.sgml | 2 +-
doc/src/sgml/release-9.1.sgml | 2 +-
doc/src/sgml/release-9.2.sgml | 2 +-
doc/src/sgml/release-9.3.sgml | 2 +-
doc/src/sgml/rules.sgml | 4 ++--
doc/src/sgml/syntax.sgml | 2 +-
14 files changed, 29 insertions(+), 26 deletions(-)