doc: Tiny markup fix.

* doc/guix.texi (Substitute Authentication): Use @samp instead of @code for
pseudo-code.

doc: Remove markup for external package names.

* doc/guix.texi (Invoking guix import): Remove markup, which is not warranted
here.

doc: Use @file instead of @code also for file extensions.

* doc/guix.texi (Defining Packages):
(Build Systems):
(Derivations):
(Invoking guix import):
(Printing Services):
(Installing Debugging Files):
(Preparing to Use the Bootstrap Binaries): Use @file instead of @code.

doc: Use @env for environment variables.

* doc/guix.texi (Binary Installation):
(Build Environment Setup):
(Invoking guix-daemon):
(Application Setup):
(After System Installation):
(Invoking guix package):
(Proxy Settings):
(Invoking guix environment):
(Packages for C Development):
(Package Modules):
(Build Systems):
(The Store):
(Common Build Options):
(Invoking guix download):
(Invoking guix refresh):
(Using the Configuration System):
(Locales):
(Base Services):
(Networking Services):
(Sound Services):
(Continuous Integration):
(PAM Mount Service):
(X.509 Certificates): Use @env instead of @code for environment variables.

gnu: usbguard: Fix warning about 'catch'.

* gnu/packages/hardware.scm (usbguard)[arguments]: Rename phase
'patch-makefile' to 'patch-build-scripts', patch 'Makefile.in' files
instead of 'Makefile.am' and fix 'catch' include path.
[native-inputs]: Remove 'autoconf' and 'automake'.

gnu: usbguard: Use packaged 'pegtl'.

* gnu/packages/hardware.scm (usbguard)[arguments]: Remove configure flag
'--with-bundled-pegtl'.
[inputs]: Add 'pegtl'

gnu: Add pegtl.

* gnu/packages/cpp.scm (pegtl): New variable.

doc: Use @option instead of @code.

* doc/guix.texi (Binary Installation):
(Requirements):
(Build Environment Setup):
(Invoking guix-daemon):
(Application Setup):
(Invoking guix package):
(Substitute Server Authorization):
(Substitution Failure):
(Invoking guix gc):
(Invoking guix pull):
(Invoking guix archive):
(Invoking guix environment):
(Invoking guix pack):
(Defining Packages):
(Build Systems):
(The Store):
(Invoking guix build):
(Common Build Options):
(Package Transformation Options):
(Additional Build Options):
(Debugging Build Failures):
(Invoking guix edit):
(Invoking guix import):
(Invoking guix refresh):
(Invoking guix lint):
(Invoking guix publish):
(Invoking guix challenge):
(Base Services):
(Virtualization Services):
(Initial RAM Disk):
(Invoking guix system):
(Preparing to Use the Bootstrap Binaries):
(Porting): Use @option instead of @code for command-line options.

doc: Fix typo in container example.

* doc/guix.texi (Invoking `guix environment'): Fix sll -> ssl typo.

doc: Add container example to run a web browser.

* doc/guix.texi (Invoking `guix environment'): Add paragraph and example to
  run Eolie in a guix environment container.  Add `container' cindex for the
  first container example, and the `certificates' cindex for the web browser
  example.

gnu: warsow-qfusion: Remove bundled binaries and inputs.

* gnu/packages/game-development.scm (warsow-qfusion)[source]: Add snippet to
  remove unused bundled binaries and inputs.

gnu: sbcl-iolib.grovel: Deprecate in favour of sbcl-cffi-grovel.

* gnu/packages/lisp-xyz.scm (sbcl-iolib.grovel): Deprecate since upstream has
  removed it; they are now using cffi-grovel instead.

gnu: sbcl-trivial-backtrace: Fix typo in description.

* gnu/packages/lisp-xyz.scm (sbcl-trivial-backtrace)[description]: Replace
  "On" with "One".

gnu: glibc/hurd-headers: Cross-build fix for the Hurd.

* gnu/packages/base.scm (glibc/hurd-headers)[native-inputs]: Add mig; when
cross-building use 32-bit mig.

syscalls: Add ioctl flags for the Hurd.

Use

    #include <stdio.h>
    #include <net/if.h>
    #include <hurd/ioctl.h>

    int
    main ()
    {
      printf ("SIOCSIFFLAGS #x%x\n", SIOCSIFFLAGS);
      printf ("SIOCGIFADDR #x%x\n", SIOCGIFADDR);
      printf ("SIOCSIFADDR #x%x\n", SIOCSIFADDR);
      printf ("SIOCGIFNETMASK #x%x\n", SIOCGIFNETMASK);
      printf ("SIOCSIFNETMASK #x%x\n", SIOCSIFNETMASK);
    #if 0
      printf ("SIOCADDRT #x%x\n", SIOCADDRT);
      printf ("SIOCDELRT #x%x\n", SIOCDELRT);
    #endif
    }

to fill in some blanks.  Adding and removing route apparently not supported.

* guix/build/syscalls.scm (SIOCSIFFLAGS SIOCGIFADDR, SIOCSIFADDR,
SIOCGIFNETMASK, SIOCSIFNETMASK):

gnu: lightdm-gtk-greeter: Wrap binary.

* gnu/package/display-managers.scm (lightdm-gtk-greeter)[inputs]: Add
shared-mime-info.
[arguments]: Add "wrap-program" phase.

Signed-off-by: Ricardo Wurmus <rekado@elephly.net>

gnu: lightdm-gtk-greeter: Fix .desktop file.

* gnu/packages/display-managers.scm (lightdm-gtk-greeter)[arguments]: Fix
reference to greeter in .desktop file with "fix-.desktop-file" phase.

Signed-off-by: Ricardo Wurmus <rekado@elephly.net>

gnu: lightdm-gtk-greeter: Fix at-spi runtime dependency.

* gnu/packages/display-manager.scm (lightdm-gtk-greeter): Fix at-spi runtime
dependency.
[inputs]: Add at-spi2-core.
[arguments]: Add "--enable-at-spi-command" configure flag.

Signed-off-by: Ricardo Wurmus <rekado@elephly.net>

gnu: lightdm: Add vala bindings.

* gnu/packages/display-managers.scm (lightdm)[native-inputs]: Add vala.

Signed-off-by: Ricardo Wurmus <rekado@elephly.net>

gnu: lightdm: Update to 1.30.0.

* gnu/packages/display-managers.scm (lightdm): Update to 1.30.0.
[arguments]: Re-enable all tests by removing 'disable-broken-tests phase.

Signed-off-by: Ricardo Wurmus <rekado@elephly.net>