event/InotifyEvent: new class wrapping inotify

Replaces class InotifySource.

src/io/FileDescriptor.cxx

@@ -44,7 +44,6 @@
 #ifdef __linux__
 #include <sys/eventfd.h>
 #include <sys/signalfd.h>
-#include <sys/inotify.h>
 #endif
 
 #ifndef O_NOCTTY
@@ -283,17 +282,6 @@ FileDescriptor::CreateSignalFD(const sigset_t *mask) noexcept
 	return true;
 }
 
-bool
-FileDescriptor::CreateInotify() noexcept
-{
-	int new_fd = inotify_init1(IN_CLOEXEC|IN_NONBLOCK);
-	if (new_fd < 0)
-		return false;
-
-	fd = new_fd;
-	return true;
-}
-
 #endif
 
 bool

src/io/FileDescriptor.hxx

@@ -209,7 +209,6 @@ public:
 #ifdef __linux__
 	bool CreateEventFD(unsigned initval=0) noexcept;
 	bool CreateSignalFD(const sigset_t *mask) noexcept;
-	bool CreateInotify() noexcept;
 #endif
 
 	/**