Potential Resource Leak in tool_parsecfg.c at line 279 during fileerror

Summary: A resource leak was identified in src/tool_parsecfg.c using the Clang Static Analyzer. When a file error occurs (fileerror is true) during config parsing, the function returns PARAM_READ_ERROR without ensuring the file stream is properly closed, leading to a potential file descriptor leak. Steps to Reproduce: 1. Analyze the curl source code using scan-build make. 2. Observe the report for src/tool_parsecfg.c. 3. The analyzer identifies that at line 264, if fileerror is triggered, the control flow reaches the return statement at line 279 without a confirmed fclose on the opened stream. ## Impact Impact: A local attacker could potentially cause a Denial of Service (DoS) by repeatedly triggering this error path, leading to file descriptor exhaustion.