cygcheck: expand common_apps list

An increasing number of tools are being included in Windows which have the
same names as those included in Cygwin packages.  Indicating which one is
first in PATH can be helpful in diagnosing behavioural discrepencies
between them.

Also, fix the alphabetization of ssh.

winsup/utils/cygcheck.cc

@@ -99,28 +99,43 @@ static common_apps[] = {
   {"awk", 0},
   {"bash", 0},
   {"cat", 0},
+  {"certutil", 0},
+  {"clinfo", 0},
+  {"comp", 0},
+  {"convert", 0},
   {"cp", 0},
   {"cpp", 1},
   {"crontab", 0},
+  {"curl", 0},
+  {"expand", 0},
   {"find", 0},
+  {"ftp", 0},
   {"gcc", 0},
   {"gdb", 0},
   {"grep", 0},
+  {"hostname", 0},
   {"kill", 0},
+  {"klist", 0},
   {"ld", 0},
   {"ls", 0},
   {"make", 0},
   {"mv", 0},
+  {"nslookup", 0},
   {"patch", 0},
   {"perl", 0},
+  {"replace", 0},
   {"rm", 0},
   {"sed", 0},
-  {"ssh", 0},
   {"sh", 0},
+  {"shutdown", 0},
+  {"sort", 0},
+  {"ssh", 0},
   {"tar", 0},
   {"test", 0},
+  {"timeout", 0},
   {"vi", 0},
   {"vim", 0},
+  {"whoami", 0},
   {0, 0}
 };