dlopen.3: Fix section ordering

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/dlopen.3

@@ -498,6 +498,21 @@ can be used to register an exit handler that is automatically
 called when a shared object is unloaded.
 .SS History
 These functions are part of the dlopen API, derived from SunOS.
+.SH BUGS
+As at glibc 2.21, specifying the
+.BR RTLD_GLOBAL
+flag when calling
+.BR dlmopen ()
+.\" dlerror(): "invalid mode"
+generates an error.
+Furthermore, specifying
+.BR RTLD_GLOBAL
+when calling
+.BR dlopen ()
+results in a program crash
+.RB ( SIGSEGV )
+if the call is made from any object loaded in a
+namespace other than the initial namespace.
 .SH EXAMPLE
 The program below loads the (glibc) math library,
 looks up the address of the
@@ -567,21 +582,6 @@ main(void)
     exit(EXIT_SUCCESS);
 }
 .fi
-.SH BUGS
-As at glibc 2.21, specifying the
-.BR RTLD_GLOBAL
-flag when calling
-.BR dlmopen ()
-.\" dlerror(): "invalid mode"
-generates an error.
-Furthermore, specifying
-.BR RTLD_GLOBAL
-when calling
-.BR dlopen ()
-results in a program crash
-.RB ( SIGSEGV )
-if the call is made from any object loaded in a
-namespace other than the initial namespace.
 .SH SEE ALSO
 .BR ld (1),
 .BR ldd (1),