Replace http://man7.org links with https://man7.org links.

I suspect the way http:// dies is that browsers just interpret it as
https:// anyway, but there's no reason not to just bulk fix all these at
source.

Change-Id: I38fa91728846d7c33207ef1bdadd4910eac9e941
diff --git a/libc/include/netinet/ether.h b/libc/include/netinet/ether.h
index 4af7eda..a847385 100644
--- a/libc/include/netinet/ether.h
+++ b/libc/include/netinet/ether.h
@@ -39,7 +39,7 @@
 __BEGIN_DECLS
 
 /**
- * [ether_ntoa(3)](http://man7.org/linux/man-pages/man3/ether_ntoa.3.html) returns a string
+ * [ether_ntoa(3)](https://man7.org/linux/man-pages/man3/ether_ntoa.3.html) returns a string
  * representation of the given Ethernet (MAC) address.
  *
  * Returns a pointer to a static buffer.
@@ -47,7 +47,7 @@
 char* _Nonnull ether_ntoa(const struct ether_addr* _Nonnull __addr);
 
 /**
- * [ether_ntoa_r(3)](http://man7.org/linux/man-pages/man3/ether_ntoa_r.3.html) returns a string
+ * [ether_ntoa_r(3)](https://man7.org/linux/man-pages/man3/ether_ntoa_r.3.html) returns a string
  * representation of the given Ethernet (MAC) address.
  *
  * Returns a pointer to the given buffer.
@@ -55,7 +55,7 @@
 char* _Nonnull ether_ntoa_r(const struct ether_addr* _Nonnull __addr, char* _Nonnull __buf);
 
 /**
- * [ether_aton(3)](http://man7.org/linux/man-pages/man3/ether_aton.3.html) returns an `ether_addr`
+ * [ether_aton(3)](https://man7.org/linux/man-pages/man3/ether_aton.3.html) returns an `ether_addr`
  * corresponding to the given Ethernet (MAC) address string.
  *
  * Returns a pointer to a static buffer, or NULL if the given string isn't a valid MAC address.
@@ -63,7 +63,7 @@
 struct ether_addr* _Nullable ether_aton(const char* _Nonnull __ascii);
 
 /**
- * [ether_aton_r(3)](http://man7.org/linux/man-pages/man3/ether_aton_r.3.html) returns an
+ * [ether_aton_r(3)](https://man7.org/linux/man-pages/man3/ether_aton_r.3.html) returns an
  * `ether_addr` corresponding to the given Ethernet (MAC) address string.
  *
  * Returns a pointer to the given buffer, or NULL if the given string isn't a valid MAC address.