Prepare for new area recruitment

find that the spawnbio ratio approach to are-specific recruitment does
not work well for equilibrium calcs;
to prepare for a new approach with explicit SRR by area, change the
spawn recruitment equilibrium function to pass some values.
Do this commit before making further changes
current code

save current, which is not as good for red snapper logL
Revert "Revert "current code""

This reverts commit ff1d59c64c71ab8dd79d44104b24658a2ae5f504.

Revert "current code"

This reverts commit
9ddc394a06d3369285ebe7d219ce786ed979245b.

Revert "clean-up formatting
of spr/ypr profile"

This reverts
commit
426eb74a815112da48eafce64cde8037931c881d.

Revert "area-specific recruitment"

This reverts commit
e92b1e1064a792649c23eea8f344b41fad22f772.

Revert "Prepare for new area recruitment"

This reverts commit
98ee57a1c0bb8af1e98f93ca9e31f071bc593edb.

Revert "current code"

This reverts commit
9ddc394a06d3369285ebe7d219ce786ed979245b.
fix code;  now OK for red snapper area model

next steps are to work on the full area-specific SRR capability