Added /etc/mysql to my.cnf search path after /etc.

bug #25104

mysys/default.c

@@ -979,10 +979,11 @@ static uint my_get_system_windows_directory(char *buffer, uint size)
 
   Everywhere else, this is:
     1. /etc/
-    2. getenv(DEFAULT_HOME_ENV)
-    3. ""
-    4. "~/"
-    5. --sysconfdir=<path>
+    2. /etc/mysql/
+    3. getenv(DEFAULT_HOME_ENV)
+    4. ""
+    5. "~/"
+    6. --sysconfdir=<path>
 
  */
 
@@ -1008,6 +1009,7 @@ static void init_default_directories()
     *ptr++= env;
 #endif
   *ptr++= "/etc/";
+  *ptr++= "/etc/mysql/";
 #endif
   if ((env= getenv(STRINGIFY_ARG(DEFAULT_HOME_ENV))))
     *ptr++= env;

scripts/mysqld_multi.sh

@@ -472,6 +472,14 @@ sub find_groups
     {
       $data[$i] = $line;
     }
+    if (-f "/etc/mysql/my.cnf" && -r "/etc/mysql/my.cnf")
+    {
+      open(MY_CNF, "</etc/mysql/my.cnf") && (@tmp=<MY_CNF>) && close(MY_CNF);
+    }
+    for (; ($line = shift @tmp); $i++)
+    {
+      $data[$i] = $line;
+    }
     if (defined($ENV{MYSQL_HOME}) && -f "$ENV{MYSQL_HOME}/my.cnf" &&
 	-r "$ENV{MYSQL_HOME}/my.cnf")
     {
@@ -491,7 +499,7 @@ sub find_groups
       $data[$i] = $line;
     }
   }
-  chop @data;
+  chomp @data;
   # Make a list of the wanted group ids
   if (defined($raw_gids))
   {