Add doc comment that installation.sgml can't use xrefs.
Branch------master
Details-------http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=8e6ae3d79c16ad8876c34f2cff8d667ca1cffb09
Modified Files--------------doc/src/sgml/installation.sgml | 6 ++++++1 files changed, 6 insertions(+), 0 deletions(-)
