Drop support for Watcom compiler, which is not c++17 compliant

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 9dd508a3c3)

akregator/src/mk4storage/metakit/README

@@ -84,7 +84,7 @@ WINDOWS
 
     There is a "win/" directory which contains subdirectories for a number of
     compiler systems.  Metakit has been built with many different compilers
-    in the past (Microsoft, Watcom, Symantec, Optima),
+    in the past (Microsoft, Symantec, Optima),
     only a few are maintained (there are 12 configurations for MSVC6 alone!).
 
     The MS Visual C++ 6.0 project is "win/msvc60/mksrc.dsw", with subprojects

akregator/src/mk4storage/metakit/src/header.h

@@ -97,8 +97,6 @@
 #include "msvc.h"
 #elif defined (__SC__)                      // Symantec C++
 #define q4_SYMC 1
-#elif defined (__WATCOMC__)                 // Watcom C++
-#define q4_WATC 1
 #endif
 
 /////////////////////////////////////////////////////////////////////////////

akregator/src/mk4storage/metakit/src/std.cpp

@@ -29,7 +29,7 @@ using namespace std;
 
 /////////////////////////////////////////////////////////////////////////////
 
-#if !q4_MSVC && !q4_WATC
+#if !q4_MSVC
 
   // MS C/C++ has this handy stricmp: a case-insensitive version of strcmp
   // This version only works with 7-bit ASCII characters 0x00 through 0x7F

akregator/src/mk4storage/metakit/src/string.cpp

@@ -34,7 +34,7 @@
   
 /////////////////////////////////////////////////////////////////////////////
 
-#if q4_MSVC || q4_WATC
+#if q4_MSVC
 #define strcasecmp stricmp
 #elif q4_WINCE
 

akregator/src/mk4storage/metakit/src/univ.cpp

@@ -21,7 +21,7 @@
 
 #if q4_UNIX || __MINGW32__
 #define _strdup strdup
-#elif !q4_MSVC && !q4_WATC
+#elif !q4_MSVC
 
   static char* _strdup(const char* p)
   {