Support any HTTP method

It's now possible to use redbean Fetch() with arbitrary HTTP methods,
e.g. LIST which is used by Hashicorp. There's an eight char limit and
uppercase canonicalization still happens. This change also includes a
better function for launching a browser tab, that won't deadlock on a
headless workstation running Debian.

Closes #1107

net/http/http.h

@@ -1,27 +1,19 @@
 #ifndef COSMOPOLITAN_LIBC_HTTP_HTTP_H_
 #define COSMOPOLITAN_LIBC_HTTP_HTTP_H_
+#include "libc/serialize.h"
 #include "libc/time/struct/tm.h"
 
 #define kHttpRequest  0
 #define kHttpResponse 1
 
-#define kHttpGet     1
-#define kHttpHead    2
-#define kHttpPost    3
-#define kHttpPut     4
-#define kHttpDelete  5
-#define kHttpOptions 6
-#define kHttpConnect 7
-#define kHttpTrace   8
-#define kHttpCopy    9
-#define kHttpLock    10
-#define kHttpMerge   11
-#define kHttpMkcol   12
-#define kHttpMove    13
-#define kHttpNotify  14
-#define kHttpPatch   15
-#define kHttpReport  16
-#define kHttpUnlock  17
+#define kHttpGet     READ32LE("GET")
+#define kHttpHead    READ32LE("HEAD")
+#define kHttpPost    READ32LE("POST")
+#define kHttpPut     READ32LE("PUT")
+#define kHttpDelete  READ64LE("DELETE\0")
+#define kHttpOptions READ64LE("OPTIONS")
+#define kHttpConnect READ64LE("CONNECT")
+#define kHttpTrace   READ64LE("TRACE\0\0")
 
 #define kHttpStateStart   0
 #define kHttpStateMethod  1
@@ -168,14 +160,13 @@ struct HttpMessage {
   int i, a, status;
   unsigned char t;
   unsigned char type;
-  unsigned char method;
   unsigned char version;
+  uint64_t method;
   struct HttpSlice k;
   struct HttpSlice uri;
   struct HttpSlice scratch;
   struct HttpSlice message;
   struct HttpSlice headers[kHttpHeadersMax];
-  struct HttpSlice xmethod;
   struct HttpHeaders xheaders;
 };
 
@@ -187,13 +178,11 @@ struct HttpUnchunker {
 };
 
 extern const char kHttpToken[256];
-extern const char kHttpMethod[18][8];
 extern const bool kHttpRepeatable[kHttpHeadersMax];
 
 const char *GetHttpReason(int);
 const char *GetHttpHeaderName(int);
 int GetHttpHeader(const char *, size_t);
-int GetHttpMethod(const char *, size_t);
 void InitHttpMessage(struct HttpMessage *, int);
 void DestroyHttpMessage(struct HttpMessage *);
 int ParseHttpMessage(struct HttpMessage *, const char *, size_t);
@@ -202,6 +191,7 @@ int64_t ParseContentLength(const char *, size_t);
 char *FormatHttpDateTime(char[hasatleast 30], struct tm *);
 bool ParseHttpRange(const char *, size_t, long, long *, long *);
 int64_t ParseHttpDateTime(const char *, size_t);
+uint64_t ParseHttpMethod(const char *, size_t);
 bool IsValidHttpToken(const char *, size_t);
 bool IsValidCookieValue(const char *, size_t);
 bool IsAcceptablePath(const char *, size_t);