2015-03-21 Version 4.2.1 Vincent Rogier vince.rogier@ocilib.net

    * Licensing
    
        - Re-licensing OCILIB to Apache License Version 2.0 instead of LGPL 2.1: this is merely for overcoming the static linkage issue of the LGPL V2.1
        
    * Fixes

        - C++ API: Fixed memory leak caused by Statement::Bind() with non scalar types when Connection objects are closed before their child Statement objects get out of scope
        - C++ API: Fixed minor compilation warnings
        - C API: Compilation was broken when targeting Oracle 8i
        - C API: PL/SQL statements starting with keyword "CALL" where not identified as PL/SQL commands and thus output bind buffers were not updated accordingly
        - C API: OCI_Execute() ignored custom fetch and prefetch values with Oracle clients >= 9.2
        - C API: OCI_ElemSetString() caused memory retention when dealing repetitively with string attributes
        - C API: OCI_Cleanup() leaked of few bytes
        - C API: OCI_BindLob() caused access violation when binding CLOB/BLOB to PL/SQL OUT parameters using OCI_BDM_OUT bind direction mode   
        - C API: OCI_DirPathSetEntry() may passed Wrong SQL type passed to OCI_NumberFromString() for some numeric columns
        - C API: OCI_GetLastError() wWas not reporting errors/warnings after the following calls: OCI_FetchPrev(), OCI_FetchNext(), OCI_FetchFirst() and OCI_FetchLast()
        - C API: OCI_MemRealloc() may manipulate dandling pointers
        - C API: Fixed some usage of OCI_BIND_CALL() macro
        - C API: OCI_ObjectGettring(): When the attribute type was not a string, the application error handler
          was called with error code OCI_ERR_ATTR_NOT_FOUND and then the method was converting the attribute to a string without problem as expected.
     
    * Changes

        - Added "Environment Variables" section in the C API documentation
        - C++ API: Added silent parameter to Date::Date()
        - C API: Fetch and Prefetch values are not reset any more to default values when statement is re-prepared
        - C API: Added support for specific environment variables: Now specific documented environment variables can be set for activating
          experimental or optional behaviours mostly for implementing workaround for Oracle Bugs.
        - C API: Added experimental workaround for unsolved Oracle OCI bug #9838993 using the environment variable "OCILIB_WORKAROUND_UTF16_COLUMN_NAME"