Function *String*-Equal

Part of:

package cl-ppcre
( *string*-equal < string2 > < start1 > < end1 > < start2 > < end2 > )

Like STRING-EQUAL, i.e. compares the special string STRING from
START1 to END1 with STRING2 from START2 to END2. Note that there's no
boundary check - this has to be implemented by the caller.