This can be used by custom BIOs for storing implementation specific information.
The BIO_set_init() function sets the value of the BIO's "init" flag to indicate
-whether initialisation has been completed for this BIO or not. A non-zero value
+whether initialisation has been completed for this BIO or not. A nonzero value
indicates that initialisation is complete, whilst zero indicates that it is not.
Often initialisation will complete during initial construction of the BIO. For
some BIOs however, initialisation may not complete until after additional steps