std.cfg: Improved configuration of strpbrk() and added regression tests. These cases were found in the wild (daca@home: ftp://ftp.de.debian.org/debian/pool/main/i/ion/ion_3.2.1+dfsg.orig.tar.gz, ion-open-source/contrib/dtnperf/dtnperf/src/utils.c:71:32: error: Invalid strpbrk() argument nr 2. A nul-terminated string is required. [invalidFunctionArgStr]).

cfg/std.cfg

@@ -5020,6 +5020,7 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
     <arg nr="1" direction="in">
       <not-null/>
       <not-uninit/>
+      <strz/>
     </arg>
     <arg nr="2" direction="in">
       <not-null/>

test/cfg/std.c

@@ -29,6 +29,19 @@
 #include <inttypes.h>
 #include <float.h>
 
+char * invalidFunctionArgStr_strpbrk( const char *p )
+{
+    const char search[] = { -42, -43, -44 };
+    const char pattern[3] = { -42, -43, -44 };
+    (void) strpbrk( "abc42", "42" );
+    // cppcheck-suppress invalidFunctionArgStr
+    (void) strpbrk( search, "42" );
+    // cppcheck-suppress invalidFunctionArgStr
+    (void) strpbrk( search, pattern );
+    // cppcheck-suppress invalidFunctionArgStr
+    return strpbrk( p, pattern );
+}
+
 int invalidFunctionArgStr_strncmp( const char *p )
 {
     // No warning is expected for: