Make important improvements

- Fix preadv() and pwritev() for old distros
- Introduce _npassert() and _unassert() macros
- Prove that file locks work properly on Windows
- Support fcntl(F_DUPFD_CLOEXEC) on more systems

net/http/encodeurl.c

@@ -18,6 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "net/http/escape.h"
 #include "net/http/url.h"
 

net/http/findcontenttype.c

@@ -21,6 +21,7 @@
 #include "libc/intrin/bswap.h"
 #include "libc/macros.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "net/http/http.h"
 
 static const struct ContentTypeExtension {

net/http/gethttpheader.inc

@@ -33,6 +33,7 @@
 #line 1 "gethttpheader.gperf"
 
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "net/http/http.h"
 #define GPERF_DOWNCASE
 #line 12 "gethttpheader.gperf"

net/http/gethttpmethod.inc

@@ -33,6 +33,7 @@
 #line 1 "gethttpmethod.gperf"
 
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "net/http/http.h"
 #define GPERF_DOWNCASE
 #line 12 "gethttpmethod.gperf"

net/http/ismimetype.c

@@ -17,6 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "net/http/http.h"
 
 /**

net/http/parseurl.c

@@ -20,6 +20,7 @@
 #include "libc/limits.h"
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "libc/x/x.h"
 #include "net/http/escape.h"
 #include "net/http/url.h"

net/http/unchunk.c

@@ -18,6 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/macros.internal.h"
 #include "libc/str/str.h"
+#include "libc/str/tab.internal.h"
 #include "libc/sysv/errfuns.h"
 #include "net/http/escape.h"
 #include "net/http/http.h"