pg_upgrade: conditionally create cluster delete script
If users create tablespaces inside the old cluster directory, it is
impossible for the delete script to delete _only_ the old cluster files,
so don't create a script in that case, and issue a message to the user.
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/4765dd79219b9697d84f5c2c70f3fe00455609a1
Modified Files
--------------
contrib/pg_upgrade/check.c | 43 +++++++++++++++++++++++++++++++++++++------
1 files changed, 37 insertions(+), 6 deletions(-)
