Revert all recent configure changes related to dependency resolution

This reverts commits 2edc718723b6, a2bb771a3cde, 21c750f240b9, 8e7bea6dc6ac.

configure

@@ -488,15 +488,8 @@ enable(){
     set_all yes $*
 }
 
-check_requested() {
-    for var; do
-        eval test "x\$${var#!}_requested" = "xyes" &&  die "${var%%_*} cannot be enabled"
-    done
-}
-
 disable(){
     set_all no $*
-    check_requested $*
 }
 
 enable_weak(){
@@ -547,32 +540,6 @@ enable_deep_weak(){
     done
 }
 
-do_enable_deep_force(){
-    for var; do
-        enabled $var && continue
-        eval sel="\$${var}_deps\ \$${var}_deps_any\ \$${var}_select\ \$${var}_suggest\ \$${var}_select_any"
-        pushvar var
-        enable_deep_force $sel
-        popvar var
-    done
-}
-
-enable_deep_force(){
-    do_enable_deep_force $*
-    for var; do
-        is_in $var $ALL_COMPONENTS $COMPONENT_LIST $LIBRARY_LIST && enable $var
-    done
-}
-
-request(){
-    disable $* # force the refresh of the dependencies
-    for var; do
-        enable ${var}_requested
-    done
-    enable_deep_force $*
-    enable $*
-}
-
 enabled(){
     test "${1#!}" = "$1" && op== || op=!=
     eval test "x\$${1#!}" $op "xyes"
@@ -632,7 +599,7 @@ do_check_deps(){
         append allopts $cfg
 
         eval dep_all="\$${cfg}_deps"
-        eval dep_any="\$${cfg}_deps_any\ \$${cfg}_select_any"
+        eval dep_any="\$${cfg}_deps_any"
         eval dep_sel="\$${cfg}_select"
         eval dep_sgs="\$${cfg}_suggest"
         eval dep_ifa="\$${cfg}_if"
@@ -2367,7 +2334,7 @@ tls_gnutls_protocol_deps="gnutls"
 tls_gnutls_protocol_select="tcp_protocol"
 tls_openssl_protocol_deps="openssl !tls_gnutls_protocol"
 tls_openssl_protocol_select="tcp_protocol"
-tls_protocol_select_any="tls_gnutls_protocol tls_openssl_protocol"
+tls_protocol_deps_any="tls_gnutls_protocol tls_openssl_protocol"
 udp_protocol_select="network"
 unix_protocol_deps="sys_un_h"
 unix_protocol_select="network"
@@ -2457,6 +2424,8 @@ target_os_default=$(tolower $(uname -s))
 host_os=$target_os_default
 
 # configurable options
+enable $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
+
 enable asm
 enable debug
 enable doc
@@ -2567,6 +2536,12 @@ ALL_COMPONENTS="
     $PROTOCOL_LIST
 "
 
+for n in $COMPONENT_LIST; do
+    v=$(toupper ${n%s})_LIST
+    eval enable \$$v
+    eval ${n}_if_any="\$$v"
+done
+
 enable $ARCH_EXT_LIST
 
 die_unknown(){
@@ -2629,11 +2604,10 @@ for opt do
             disable $PROGRAM_LIST
         ;;
         --disable-everything)
-            map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
+            map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
-            enable_deep_force $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
         ;;
         --disable-all)
-            map 'eval disable \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
+            map 'eval unset \${$(toupper ${v%s})_LIST}' $COMPONENT_LIST
             disable $LIBRARY_LIST $PROGRAM_LIST doc
         ;;
         --enable-random|--disable-random)
@@ -2649,7 +2623,6 @@ for opt do
             is_in "${thing}s" $COMPONENT_LIST || die_unknown "$opt"
             eval list=\$$(toupper $thing)_LIST
             name=$(echo "${optval}" | sed "s/,/_${thing}|/g")_${thing}
-            test $action = enable && action="request"
             $action $(filter "$name" $list)
         ;;
         --enable-avserver|--disable-avserver*)
@@ -2659,10 +2632,9 @@ for opt do
         --enable-?*|--disable-?*)
             eval $(echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g')
             if is_in $option $COMPONENT_LIST; then
-                test $action = enable && action="enable_deep_force"
+                test $action = disable && action=unset
                 eval $action \$$(toupper ${option%s})_LIST
             elif is_in $option $CMDLINE_SELECT; then
-                test $action = enable && action="request"
                 $action $option
             else
                 die_unknown $opt
@@ -2697,15 +2669,11 @@ done
 
 disabled logging && logfile=/dev/null
 
-# Enable the default components if not disabled explicitly
-
-enable_weak $EXAMPLE_LIST $LIBRARY_LIST $PROGRAM_LIST
-
 # Disable all the library-specific components if the library itself
 # is disabled, see AVCODEC_LIST and following _LIST variables.
 
 disable_components(){
-    disabled ${1} && disable_weak $(
+    disabled ${1} && disable $(
         eval components="\$$(toupper ${1})_COMPONENTS"
         map 'eval echo \${$(toupper ${v%s})_LIST}' $components
     )
@@ -2713,23 +2681,6 @@ disable_components(){
 
 map 'disable_components $v' $LIBRARY_LIST
 
-# Mark components that had not been enabled/disabled explicitly
-# as enabled
-
-for n in $COMPONENT_LIST; do
-    v=$(toupper ${n%s})_LIST
-    eval enable_weak \$$v
-    eval ${n}_if_any="\$$v"
-done
-
-# Make so that disabled libraries are enabled if a component
-# of them is requested
-
-for n in $LIBRARY_LIST; do
-    v=$(toupper ${n})_COMPONENTS
-    eval ${n}_if_any="\$$v"
-done
-
 echo "# $0 $LIBAV_CONFIGURATION" > $logfile
 set >> $logfile