CSQL-F-016: UNIX Exec error Return Code is `Return-Code`

This message is displayed when running under UNIX. On UNIX this is not a fatal error. If a database precompiler came across errors in the source file, it is likely it would produce a non-zero return code. Because this might happen, COBSQL will continue after displaying this message.

CSQL-F-016: UNIX Exec error Return Code is Return-Code

CSQL-F-016: UNIX Exec error Return Code is `Return-Code`