libzypp: RAII solutions

libzypp 17.38.15

RAII solutions

## Classes
class | zypp::SignalSaver
| Exception safe signal handler save/restore. More...
class | zypp::SigprocmaskSaver
| Exception safe sigprocmask save/restore. More...
struct | zypp::solver::detail::ScopedAutoTestCaseWriter
| Write automatic testcases if ZYPP_FULLLOG=1 is set. More...
struct | zypp::target::rpm::HeaderEntryGetter
| Helper for header data retieval. More...
class | zypp::DtorReset
| Assign a vaiable a certain value when going out of scope. More...
struct | zypp::str::SafeBuf
| Assert `free` called for allocated char *. More...
class | zypp::LocaleGuard
| Temorarily change a locale category value. More...
class | ReleaseFileGuard
| Release a provided file upon destruction. More...
class | zypp::PluginExecutor
| Parallel execution of stateful PluginScripts. More...
class | zypp::ResPoolProxy::ScopedSaveState
| Exception safe scoped save/restore state. More...
class | zypp::AutoFD
| AutoDispose<int> calling `::close` More...
class | zypp::AutoFILE
| AutoDispose<FILE*> calling `::fclose` More...
class | AutoFREE< Tp >
| AutoDispose<Tp*> calling `::free` More...
class | zypp::env::ScopedSet
| Temporarily set/unset an environment variable. More...

## Detailed Description

See also
  http://en.wikipedia.org/wiki/Resource_Acquisition_Is_Initialization