The Registry will try to load the specified file (specified by argument
to the method load_all(), in the envrionment variable ENSEMBL_REGISTRY,
or the file '~/.ensembl_init', as before) as an ini-file.  If this fails
due to the file having the wrong format, the code reverts to the old
behaviour of using require() on the same file.

This is an example of a simple ini-file.  There is no check to see
that e.g. 'dbname' is actually present or to avoid calling the adaptor
initialization routines with unnecessary parameters (we trust the user
to get this right).  The correct adaptor is chosen by peeking at the
'group' setting.


; Simple Ensembl config file example

; The 'default' section is special and its settings will be implicit for
; all other sections in this file but may be overridden by individual           ; sections.  There should be no 'alias' settings in the 'default'
; section.

[default]
user    = anonymous
host    = ensembldb.ensembl.org
group   = Core

[the_human_db]
species = Human
dbname  = homo_sapiens_core_45_36g
alias   = mary
alias   = john

[the_mouse_db]
species = Mouse
dbname  = mus_musculus_core_45_36f
alias   = minnie
alias   = mickey

; Configuration ends here