Improve quoting in eval statements

This covers some corner cases where, for instance, IFS does not contain
whitespace characters.

src/lib/auto.action

@@ -18,7 +18,7 @@ case $ACTION in
     DhcpcdOptions+=" -K -L"
     ip_set || exit 1
     # Sandbox the eval
-    if ! ( eval $ExecUpPost ); then
+    if ! ( do_debug eval "$ExecUpPost" ); then
         # Failing ExecUpPost will take the connection down
         netctl-auto stop "$INTERFACE"
         exit 1
@@ -26,7 +26,7 @@ case $ACTION in
   ;;
   DISCONNECT)
     # Sandbox the eval
-    if ! ( eval $ExecDownPre ); then
+    if ! ( do_debug eval "$ExecDownPre" ); then
         exit 1
     fi
     ip_unset

src/lib/globals

@@ -93,7 +93,7 @@ timeout_wait() {
     local timeout=$1
     (( timeout *= 5 ))
     shift
-    until eval "$*"; do
+    until eval "$@"; do
         (( timeout-- > 0 )) || return 1
         sleep 0.2
     done

src/lib/network

@@ -49,7 +49,7 @@ case $1 in
     fi
     network_ready
     # Sandbox the eval
-    if ! ( eval $ExecUpPost ); then
+    if ! ( do_debug eval "$ExecUpPost" ); then
         report_error "ExecUpPost failed for network profile '$Profile'"
         # Failing ExecUpPost will take the connection down
         "${Connection}_down"
@@ -61,7 +61,7 @@ case $1 in
   stop)
     report_notice "Stopping network profile '$Profile'..."
     # Sandbox the eval
-    if ! ( eval $ExecDownPre ); then
+    if ! ( do_debug eval "$ExecDownPre" ); then
         report_error "ExecDownPre failed for network profile '$Profile'"
         # Failing ExecDownPre will leave the profile active
         exit 1