manpage: minor corrections

$ groff -ww -mandoc -z strace.1
strace.1:65: warning: macro `IX' not defined

* strace.1: define IX macro as empty for groff.
Change remaining '-' as minus to '\-'.
Have two word spaces after a full stop as an end of sentence.
Use extra space ('\,' or '\/') between roman and italic characters.
Based on patch by Bjarni Ingi Gislason <bjarniig@rhi.hi.is>.
This fixes Debian bug #725987.
debian: update control file

* debian/control (strace64): Fix a typo in package description.
Patch by Pascal De Vuyst <pascal.devuyst@gmail.com>.
(strace, strace-udeb): Add x32 to architecture list.
Patch by Guillaume Morin <guillaume@morinfr.org>.
(strace, strace-udeb): Add or1k to architecture list.
Patch by Christian Svensson <debian@cmd.nu>.
(strace, strace-udeb): Add arm64 to architecture list,
and remove defunct arm.
Patch by Wookey <wookey@debian.org>.

This fixes Debian bugs: #697625, #727018, #742235, #749956.
debian: enable security hardening features

* debian/rules: Follow the advice in https://wiki.debian.org/Hardening
and enable maximum hardening as for programs that handle untrusted data.
Patch by Markus <waldeck@gmx.de>.
Warn about flags that have no effect with -c

* strace.c (init): Issue a warning if -i, -k, -r, -t, -T, or -y is used
along with -c.
This fixes Debian bug #443895.
NEWS: Prepare for 4.9 release
Decode paths associated with file descriptors returned by syscalls

* defs.h (RVAL_FD): New macro.
(RVAL_MASK, RVAL_STR, RVAL_NONE): Update.
* desc.c (sys_dup, sys_delete_module): New functions.
(do_dup2, decode_open, sys_creat): Change return value to RVAL_FD.
* linux/dummy.h (sys_delete_module, sys_dup): Remove.
* linux/syscall.h (sys_delete_module, sys_dup): New prototypes.
* syscall.c (trace_syscall_exiting): Handle RVAL_FD.

Signed-off-by: Zubin Mithra <zubin.mithra@gmail.com>
Fix delete_module decoding

* xlat/delete_module_flags.in: New file.
* file.c (sys_delete_module): Move ...
* bjm.c (sys_delete_module): ... to here.
Decode 1st argument using printstr instead of printpath.
* NEWS: Mention it.