curl.1: update RFC references

docs/curl.1

@@ -1263,21 +1263,21 @@ this option set you tell it not to do that.
 
 (Added in 7.42.0)
 .IP "--post301"
-(HTTP) Tells curl to respect RFC 2616/10.3.2 and not convert POST requests
+(HTTP) Tells curl to respect RFC 7230/6.4.2 and not convert POST requests
 into GET requests when following a 301 redirection. The non-RFC behaviour is
 ubiquitous in web browsers, so curl does the conversion by default to maintain
 consistency. However, a server may require a POST to remain a POST after such
 a redirection. This option is meaningful only when using \fI-L, --location\fP
 (Added in 7.17.1)
 .IP "--post302"
-(HTTP) Tells curl to respect RFC 2616/10.3.2 and not convert POST requests
+(HTTP) Tells curl to respect RFC 7230/6.4.3 and not convert POST requests
 into GET requests when following a 302 redirection. The non-RFC behaviour is
 ubiquitous in web browsers, so curl does the conversion by default to maintain
 consistency. However, a server may require a POST to remain a POST after such
 a redirection. This option is meaningful only when using \fI-L, --location\fP
 (Added in 7.19.1)
 .IP "--post303"
-(HTTP) Tells curl to respect RFC 2616/10.3.2 and not convert POST requests
+(HTTP) Tells curl to respect RFC 7230/6.4.4 and not convert POST requests
 into GET requests when following a 303 redirection. The non-RFC behaviour is
 ubiquitous in web browsers, so curl does the conversion by default to maintain
 consistency. However, a server may require a POST to remain a POST after such