Merge 10.1 into 10.2

For running the Galera tests, the variable my_disable_leak_check
was set to true in order to avoid assertions due to memory leaks
at shutdown.

Some adjustments due to MDEV-13625 (merge InnoDB tests from MySQL 5.6)
were performed. The most notable behaviour changes from 10.0 and 10.1
are the following:

* innodb.innodb-table-online: adjustments for the DROP COLUMN
behaviour change (MDEV-11114, MDEV-13613)

* innodb.innodb-index-online-fk: the removal of a (1,NULL) record
from the result; originally removed in MySQL 5.7 in the
Oracle Bug #16244691 fix
377774689b

* innodb.create-index-debug: disabled due to MDEV-13680
(the MySQL Bug #77497 fix was not merged from 5.6 to 5.7.10)

* innodb.innodb-alter-autoinc: MariaDB 10.2 behaves like MySQL 5.6/5.7,
while MariaDB 10.0 and 10.1 assign different values when
auto_increment_increment or auto_increment_offset are used.
Also MySQL 5.6/5.7 exhibit different behaviour between
LGORITHM=INPLACE and ALGORITHM=COPY, so something needs to be tested
and fixed in both MariaDB 10.0 and 10.2.

* innodb.innodb-wl5980-alter: disabled because it would trigger an
InnoDB assertion failure (MDEV-13668 may need additional effort in 10.2)

scripts/wsrep_sst_common.sh

@@ -32,6 +32,22 @@ while [ $# -gt 0 ]; do
 case "$1" in
     '--address')
         readonly WSREP_SST_OPT_ADDR="$2"
+        #
+        # Break address string into host:port/path parts
+        #
+        if echo $WSREP_SST_OPT_ADDR | grep -qe '^\[.*\]'
+        then
+            # IPv6 notation
+            readonly WSREP_SST_OPT_HOST=${WSREP_SST_OPT_ADDR/\]*/\]}
+            readonly WSREP_SST_OPT_HOST_UNESCAPED=$(echo $WSREP_SST_OPT_HOST | \
+                 cut -d '[' -f 2 | cut -d ']' -f 1)
+        else
+            # "traditional" notation
+            readonly WSREP_SST_OPT_HOST=${WSREP_SST_OPT_ADDR%%[:/]*}
+        fi
+        readonly WSREP_SST_OPT_PORT=$(echo $WSREP_SST_OPT_ADDR | \
+                cut -d ']' -f 2 | cut -s -d ':' -f 2 | cut -d '/' -f 1)
+        readonly WSREP_SST_OPT_PATH=${WSREP_SST_OPT_ADDR#*/}
         shift
         ;;
     '--bypass')
@@ -180,6 +196,11 @@ wsrep_log_error()
     wsrep_log "[ERROR] $*"
 }
 
+wsrep_log_warning()
+{
+    wsrep_log "[WARNING] $*"
+}
+
 wsrep_log_info()
 {
     wsrep_log "[INFO] $*"
@@ -213,3 +234,39 @@ wsrep_check_programs()
 
     return $ret
 }
+
+#
+# user can specify xtrabackup specific settings that will be used during sst
+# process like encryption, etc.....
+# parse such configuration option. (group for xb settings is [sst] in my.cnf
+#
+# 1st param: group : name of the config file section, e.g. mysqld
+# 2nd param: var : name of the variable in the section, e.g. server-id
+# 3rd param: - : default value for the param
+parse_cnf()
+{
+    local group=$1
+    local var=$2
+    local reval=""
+
+    # print the default settings for given group using my_print_default.
+    # normalize the variable names specified in cnf file (user can use _ or - for example log-bin or log_bin)
+    # then grep for needed variable
+    # finally get the variable value (if variables has been specified multiple time use the last value only)
+
+    # look in group+suffix
+    if [[ -n $WSREP_SST_OPT_CONF_SUFFIX ]]; then
+        reval=$($MY_PRINT_DEFAULTS -c $WSREP_SST_OPT_CONF "${group}${WSREP_SST_OPT_CONF_SUFFIX}" | awk -F= '{if ($1 ~ /_/) { gsub(/_/,"-",$1); print $1"="$2 } else { print $0 }}' | grep -- "--$var=" | cut -d= -f2- | tail -1)
+    fi
+
+    # look in group
+    if [[ -z $reval ]]; then
+        reval=$($MY_PRINT_DEFAULTS -c $WSREP_SST_OPT_CONF $group | awk -F= '{if ($1 ~ /_/) { gsub(/_/,"-",$1); print $1"="$2 } else { print $0 }}' | grep -- "--$var=" | cut -d= -f2- | tail -1)
+    fi
+
+    # use default if we haven't found a value
+    if [[ -z $reval ]]; then
+        [[ -n $3 ]] && reval=$3
+    fi
+    echo $reval
+}