connectd: add annotation and fix up formatting on connectd/netaddress.c

This is stolen from the bitcoind source, so we use their style
(no tabs, 4-wide spaces).  Clean it up and add the emacs magic to
maintain it in future.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

connectd/netaddress.c

@@ -1,3 +1,4 @@
+/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
 #include <arpa/inet.h>
 #include <assert.h>
 #include <common/status.h>
@@ -112,8 +113,8 @@ static bool IsRFC6598(const struct wireaddr *addr)
 static bool IsRFC5737(const struct wireaddr *addr)
 {
     return IsIPv4(addr) && ((GetByte(addr, 3) == 192 && GetByte(addr, 2) == 0 && GetByte(addr, 1) == 2) ||
-        (GetByte(addr, 3) == 198 && GetByte(addr, 2) == 51 && GetByte(addr, 1) == 100) ||
-        (GetByte(addr, 3) == 203 && GetByte(addr, 2) == 0 && GetByte(addr, 1) == 113));
+                            (GetByte(addr, 3) == 198 && GetByte(addr, 2) == 51 && GetByte(addr, 1) == 100) ||
+                            (GetByte(addr, 3) == 203 && GetByte(addr, 2) == 0 && GetByte(addr, 1) == 113));
 }
 
 static bool IsRFC3849(const struct wireaddr *addr)
@@ -139,21 +140,21 @@ static bool IsRFC4843(const struct wireaddr *addr)
 
 static bool IsTor(const struct wireaddr *addr)
 {
-	return addr->type == ADDR_TYPE_TOR_V2 || addr->type == ADDR_TYPE_TOR_V3;
+    return addr->type == ADDR_TYPE_TOR_V2 || addr->type == ADDR_TYPE_TOR_V3;
 }
 
 static bool IsLocal(const struct wireaddr *addr)
 {
     // IPv4 loopback
-   if (IsIPv4(addr) && (GetByte(addr, 3) == 127 || GetByte(addr, 3) == 0))
-       return true;
+    if (IsIPv4(addr) && (GetByte(addr, 3) == 127 || GetByte(addr, 3) == 0))
+        return true;
 
-   // IPv6 loopback (::1/128)
-   static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
-   if (IsIPv6(addr) && RawEq(addr, pchLocal, sizeof(pchLocal)))
-       return true;
+    // IPv6 loopback (::1/128)
+    static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
+    if (IsIPv6(addr) && RawEq(addr, pchLocal, sizeof(pchLocal)))
+        return true;
 
-   return false;
+    return false;
 }
 
 static bool IsInternal(const struct wireaddr *addr)
@@ -205,20 +206,20 @@ static bool get_local_sockname(int af, void *saddr, socklen_t saddrlen)
     int fd = socket(af, SOCK_DGRAM, 0);
     if (fd < 0) {
         status_debug("Failed to create %u socket: %s",
-		     af, strerror(errno));
+                     af, strerror(errno));
         return false;
     }
 
     if (connect(fd, saddr, saddrlen) != 0) {
         status_debug("Failed to connect %u socket: %s",
-		     af, strerror(errno));
+                     af, strerror(errno));
         close(fd);
         return false;
     }
 
     if (getsockname(fd, saddr, &saddrlen) != 0) {
         status_debug("Failed to get %u socket name: %s",
-		     af, strerror(errno));
+                     af, strerror(errno));
         close(fd);
         return false;
     }
@@ -236,9 +237,9 @@ bool guess_address(struct wireaddr *addr)
     case ADDR_TYPE_IPV4: {
         struct sockaddr_in sin;
         memset(&sin, 0, sizeof(sin));
-	sin.sin_port = htons(53);
+        sin.sin_port = htons(53);
         /* 8.8.8.8 */
-	sin.sin_addr.s_addr = 0x08080808;
+        sin.sin_addr.s_addr = 0x08080808;
         sin.sin_family = AF_INET;
         ret = get_local_sockname(AF_INET, &sin, sizeof(sin));
         addr->addrlen = sizeof(sin.sin_addr);
@@ -250,7 +251,7 @@ bool guess_address(struct wireaddr *addr)
         memset(&sin6, 0, sizeof(sin6));
         /* 2001:4860:4860::8888 */
         static const unsigned char pchGoogle[16]
-                = {0x20,0x01,0x48,0x60,0x48,0x60,0,0,0,0,0,0,8,8,8,8};
+            = {0x20,0x01,0x48,0x60,0x48,0x60,0,0,0,0,0,0,8,8,8,8};
         memset(&sin6, 0, sizeof(sin6));
         sin6.sin6_port = htons(53);
         sin6.sin6_family = AF_INET6;
@@ -271,6 +272,6 @@ bool guess_address(struct wireaddr *addr)
 bool address_routable(const struct wireaddr *wireaddr, bool allow_localhost)
 {
     if (allow_localhost && IsLocal(wireaddr))
-	return true;
+        return true;
     return IsRoutable(wireaddr);
 }