davfs2: update to 1.5.6

Split musl patch into multiple small ones. Much easier to reason about.

Removed stack protector patch. This is not an issue anymore.

Removed NLS support. There seems to be a linking issue as
libiconv-stub does not have a shared library component.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/davfs2/patches/070-no-error.patch

@@ -0,0 +1,120 @@
+--- a/configure.ac
++++ b/configure.ac
+@@ -42,7 +42,7 @@ DAV_CHECK_NEON
+ # Checks for header files.
+ AC_HEADER_DIRENT
+ AC_HEADER_STDC
+-AC_CHECK_HEADERS([fcntl.h iconv.h libintl.h langinfo.h limits.h locale.h mntent.h stddef.h stdint.h stdlib.h string.h sys/file.h sys/mount.h sys/time.h syslog.h termios.h unistd.h utime.h])
++AC_CHECK_HEADERS([error.h fcntl.h iconv.h libintl.h langinfo.h limits.h locale.h mntent.h stddef.h stdint.h stdlib.h string.h sys/file.h sys/mount.h sys/time.h syslog.h termios.h unistd.h utime.h])
+ 
+ # Checks for typedefs, structures, and compiler characteristics.
+ AC_C_CONST
+--- a/src/cache.c
++++ b/src/cache.c
+@@ -19,12 +19,12 @@
+ 
+ 
+ #include "config.h"
++#include "compat.h"
+ 
+ #ifdef HAVE_DIRENT_H
+ #include <dirent.h>
+ #endif
+ #include <errno.h>
+-#include <error.h>
+ #ifdef HAVE_FCNTL_H
+ #include <fcntl.h>
+ #endif
+--- /dev/null
++++ b/src/compat.h
+@@ -0,0 +1,39 @@
++#ifndef _COMPAT_H
++#define _COMPAT_H
++
++#ifdef HAVE_ERROR_H
++# include <error.h>
++#else
++# include <stdio.h>
++# include <stdarg.h>
++# include <stdlib.h>
++# include <string.h>
++static void error_at_line(int status, int errnum, const char *filename,
++                          unsigned int linenum, const char *format, ...)
++{
++	va_list ap;
++
++	fflush(stdout);
++
++	if (filename != NULL)
++		fprintf(stderr, "%s:%u: ", filename, linenum);
++
++	va_start(ap, format);
++	vfprintf(stderr, format, ap);
++	va_end(ap);
++
++	if (errnum != 0)
++		fprintf(stderr, ": %s", strerror(errnum));
++
++	fprintf(stderr, "\n");
++
++	if (status != 0)
++		exit(status);
++}
++
++#define error(status, errnum, format...) \
++	error_at_line(status, errnum, NULL, 0, format)
++
++#endif /* HAVE_ERROR_H */
++
++#endif /* _COMPAT_H */
+--- a/src/kernel_interface.c
++++ b/src/kernel_interface.c
+@@ -19,8 +19,8 @@
+ 
+ 
+ #include "config.h"
++#include "compat.h"
+ 
+-#include <error.h>
+ #ifdef HAVE_FCNTL_H
+ #include <fcntl.h>
+ #endif
+--- a/src/mount_davfs.c
++++ b/src/mount_davfs.c
+@@ -19,10 +19,10 @@
+ 
+ 
+ #include "config.h"
++#include "compat.h"
+ 
+ #include <ctype.h>
+ #include <errno.h>
+-#include <error.h>
+ #ifdef HAVE_FCNTL_H
+ #include <fcntl.h>
+ #endif
+--- a/src/umount_davfs.c
++++ b/src/umount_davfs.c
+@@ -19,8 +19,8 @@
+ 
+ 
+ #include "config.h"
++#include "compat.h"
+ 
+-#include <error.h>
+ #include <errno.h>
+ #include <getopt.h>
+ #ifdef HAVE_LIBINTL_H
+--- a/src/webdav.c
++++ b/src/webdav.c
+@@ -19,9 +19,9 @@
+ 
+ 
+ #include "config.h"
++#include "compat.h"
+ 
+ #include <errno.h>
+-#include <error.h>
+ #ifdef HAVE_FCNTL_H
+ #include <fcntl.h>
+ #endif