Adapt to slweb's include paths

slweb puts its header files into its own directory in order to avoid
potential name clashing.

auth.c

@@ -1,7 +1,7 @@
 #include "auth.h"
 #include "hex.h"
-#include "http.h"
 #include "jwt.h"
+#include <slweb/http.h>
 #include <cjson/cJSON.h>
 #include <dynstr.h>
 #include <openssl/sha.h>

auth.h

@@ -1,7 +1,7 @@
 #ifndef AUTH_H
 #define AUTH_H
 
-#include "http.h"
+#include <slweb/http.h>
 #include <stdbool.h>
 
 struct auth *auth_alloc(const char *dir);

main.c

@@ -2,12 +2,12 @@
 
 #include "auth.h"
 #include "cftw.h"
-#include "handler.h"
 #include "hex.h"
-#include "http.h"
 #include "page.h"
 #include "style.h"
-#include "wildcard_cmp.h"
+#include <slweb/handler.h>
+#include <slweb/http.h>
+#include <slweb/wildcard_cmp.h>
 #include <openssl/err.h>
 #include <openssl/rand.h>
 #include <dynstr.h>

page.c

@@ -1,8 +1,8 @@
 #define _POSIX_C_SOURCE 200809L
 
 #include "page.h"
-#include "http.h"
-#include "html.h"
+#include <slweb/html.h>
+#include <slweb/http.h>
 #include <dynstr.h>
 #include <dirent.h>
 #include <fcntl.h>

page.h

@@ -1,7 +1,7 @@
 #ifndef PAGE_H
 #define PAGE_H
 
-#include "http.h"
+#include <slweb/http.h>
 #include <stdbool.h>
 #include <stddef.h>