New warnfixes (#2254)

* Fix clang warnings

* Remove vim tab guides

* initialize variables

* 'strncpy' output truncated before terminating nul copying as many bytes from a string as its length

* Fix ISO C++17 does not allow 'register' storage class specifier for outdated bison

* chars are unsigned on ARM, having  if (ival < 0) always false

* chars are unsigned by default on ARM and comparison with -1 if always true

utils/configcpp/configcpp.cpp

@@ -684,4 +684,3 @@ std::string Config::getTempFileDir(Config::TempDirPurpose what)
 }
 
 }  // namespace config
-// vim:ts=4 sw=4:

utils/configcpp/configcpp.h

@@ -254,4 +254,3 @@ class Config
 
 #undef EXPORT
 
-// vim:ts=4 sw=4:

utils/configcpp/configstream.cpp

@@ -64,4 +64,3 @@ void ConfigStream::init(const xmlChar* xp)
 }
 
 }  // namespace config
-// vim:ts=4 sw=4:

utils/configcpp/configstream.h

@@ -61,4 +61,3 @@ class ConfigStream
 
 }  // namespace config
 
-// vim:ts=4 sw=4:

utils/configcpp/xmlparser.cpp

@@ -285,4 +285,3 @@ const vector<string> XMLParser::enumSection(const xmlDocPtr doc, const string& s
 }
 
 }  // namespace config
-// vim:ts=4 sw=4:

utils/configcpp/xmlparser.h

@@ -63,4 +63,3 @@ class XMLParser
 
 }  // namespace config
 
-// vim:ts=4 sw=4: