Due to changes in XlogRecPtr in 9.3, older version of pg_rman are
already incompatible either way, and it is a pain to maintain code
duplicated from past versions of Postgres, so rely a maximum on the
core structures.
History file format has changed from 9.2 to 9.3 to indicate the WAL record
when timeline branched off. In 9.2, the complete WAL file name was used
while in 9.3 the WAL record is used (like 1/4000090). pg_rman contains a
copy of a function of postgres core code to parse the history file that
was not anymore compatible, leading to errors related to timelines.
In Postgres 9.3, XLogRecPtr has been changed to a unique uint64, making
the old structure based on two uint32 obsolete. Note that this makes
pg_rman incompatible with PG <= 9.2.
Michael Paquier