Function: ellsearch
Section: elliptic_curves
C-Name: ellsearch
Prototype: G
Help: ellsearch(N): if N is an integer, it is taken as a conductor else if N is
 a string, it can be a curve name ("11a1"), a isogeny class ("11a") or a
 conductor ("11"). Return all curves in the elldata database that match the 
 property.

