Fix problems found by travis.

dnsapi/dns_cyon.sh

@@ -76,6 +76,9 @@ _load_credentials() {
   fi
 
   if [ -z "${cyon_username}" ] || [ -z "${cyon_password}" ]; then
+    cyon_username=""
+    cyon_password=""
+    cyon_otp_secret=""
     _err ""
     _err "You haven't set your cyon.ch login credentials yet."
     _err "Please set the required cyon environment variables."
@@ -168,14 +171,11 @@ _login() {
 
   _info "    success"
 
-
   # NECESSARY!! Load the main page after login, before the OTP check.
   curl "https://my.cyon.ch/" -s --compressed -b "${cookiejar}" >/dev/null
 
-
   # todo: instead of just checking if the env variable is defined, check if we actually need to do a 2FA auth request.
 
-
   # 2FA authentication with OTP?
   if [ ! -z "${cyon_otp_secret}" ]; then
     _info "  - Authorising with OTP code..."
@@ -298,9 +298,8 @@ _delete_txt() {
 
   _dns_entry_num=0
 
-  echo "${_dns_entries}" | while read -r _hash _identifier
-  do
-    ((_dns_entry_num++))
+  echo "${_dns_entries}" | while read -r _hash _identifier; do
+    _dns_entry_num=$((_dns_entry_num + 1))
 
     delete_txt_response=$(curl \
       "https://my.cyon.ch/domain/dnseditor/delete-record-async" \
@@ -335,7 +334,7 @@ _delete_txt() {
 
 _check_2fa_miss() {
   # Did we miss the 2FA?
-  if [[ "$1" =~ "multi_factor_form" ]] ; then
+  if test "${1#*multi_factor_form}" != "$1"; then
     _fail "    Missed OTP authentication!"
   fi
 }