Fix a lot of man7 links to be more specific.

Bug: https://github.com/android/ndk/issues/2113
Change-Id: Ifc3add91c39422985c63e895dc32443b8f736c9d
diff --git a/libc/include/sys/klog.h b/libc/include/sys/klog.h
index 237d2e2..6ee410f 100644
--- a/libc/include/sys/klog.h
+++ b/libc/include/sys/klog.h
@@ -61,7 +61,7 @@
 #define KLOG_SIZE_BUFFER 10
 
 /**
- * [klogctl(2)](https://man7.org/linux/man-pages/man2/syslog.2.html) operates on the kernel log.
+ * [klogctl(3)](https://man7.org/linux/man-pages/man2/klogctl.3.html) operates on the kernel log.
  *
  * This system call is not available to applications.
  * Use syslog() or `<android/log.h>` instead.