configure: miscellaneous cosmetics

Sort lists of components. Add some whitespace where it helps readability.
Consistently use double instead of single quotes around component lists.

configure

@@ -1158,6 +1158,7 @@ HWACCEL_LIST="
     vda
     vdpau
 "
+
 LIBRARY_LIST="
     avcodec
     avdevice
@@ -1196,8 +1197,8 @@ CONFIG_LIST="
     neon_clobber_test
     network
     nonfree
-    pod2man
     pic
+    pod2man
     rdft
     runtime_cpudetect
     safe_bitstream_reader
@@ -1212,18 +1213,18 @@ CONFIG_LIST="
     xmm_clobber_test
 "
 
-THREADS_LIST='
+THREADS_LIST="
     pthreads
     w32threads
-'
+"
 
-ATOMICS_LIST='
+ATOMICS_LIST="
     atomics_gcc
     atomics_suncc
     atomics_win32
-'
+"
 
-ARCH_LIST='
+ARCH_LIST="
     aarch64
     alpha
     arm
@@ -1248,23 +1249,22 @@ ARCH_LIST='
     x86
     x86_32
     x86_64
-'
+"
 
-ARCH_EXT_LIST_ARM='
+ARCH_EXT_LIST_ARM="
     armv5te
     armv6
     armv6t2
     neon
     vfp
     vfpv3
-'
+"
 
-ARCH_EXT_LIST_X86_SIMD='
+ARCH_EXT_LIST_X86_SIMD="
     amd3dnow
     amd3dnowext
     avx
     avx2
-    xop
     fma3
     fma4
     mmx
@@ -1275,7 +1275,8 @@ ARCH_EXT_LIST_X86_SIMD='
     sse4
     sse42
     ssse3
-'
+    xop
+"
 
 ARCH_EXT_LIST_X86="
     $ARCH_EXT_LIST_X86_SIMD
@@ -1291,16 +1292,16 @@ ARCH_EXT_LIST="
     vis
 "
 
-HAVE_LIST_CMDLINE='
+HAVE_LIST_CMDLINE="
     inline_asm
     symver
     yasm
-'
+"
 
-HAVE_LIST_PUB='
+HAVE_LIST_PUB="
     bigendian
     fast_unaligned
-'
+"
 
 MATH_FUNCS="
     atanf
@@ -1333,11 +1334,11 @@ HAVE_LIST="
     $ARCH_EXT_LIST
     $(add_suffix _external $ARCH_EXT_LIST)
     $(add_suffix _inline   $ARCH_EXT_LIST)
+    $ATOMICS_LIST
     $HAVE_LIST_CMDLINE
     $HAVE_LIST_PUB
-    $THREADS_LIST
-    $ATOMICS_LIST
     $MATH_FUNCS
+    $THREADS_LIST
     aligned_malloc
     aligned_stack
     alsa_asoundlib_h
@@ -1378,16 +1379,16 @@ HAVE_LIST="
     GetProcessAffinityMask
     GetProcessMemoryInfo
     GetProcessTimes
-    GetSystemTimeAsFileTime
     getrusage
     getservbyport
+    GetSystemTimeAsFileTime
     gettimeofday
     gnu_as
     gsm_h
     ibm_asm
     inet_aton
-    io_h
     inline_asm_labels
+    io_h
     isatty
     jack_port_get_latency_range
     ldbrx
@@ -1440,8 +1441,6 @@ HAVE_LIST="
     symver_asm_label
     symver_gnu_asm
     sync_val_compare_and_swap
-    sysconf
-    sysctl
     sys_mman_h
     sys_param_h
     sys_resource_h
@@ -1450,6 +1449,8 @@ HAVE_LIST="
     sys_time_h
     sys_un_h
     sys_videoio_h
+    sysconf
+    sysctl
     threads
     unistd_h
     usleep
@@ -1511,7 +1512,7 @@ CMDLINE_SELECT="
     optimizations
 "
 
-PATHS_LIST='
+PATHS_LIST="
     bindir
     datadir
     docdir
@@ -1520,7 +1521,7 @@ PATHS_LIST='
     mandir
     prefix
     shlibdir
-'
+"
 
 CMDLINE_SET="
     $PATHS_LIST
@@ -1724,8 +1725,8 @@ mdec_decoder_select="dsputil error_resilience mpegvideo"
 metasound_decoder_select="lsp mdct sinewin"
 mimic_decoder_select="dsputil hpeldsp"
 mjpeg_decoder_select="dsputil hpeldsp"
-mjpegb_decoder_select="mjpeg_decoder"
 mjpeg_encoder_select="aandcttables dsputil mpegvideoenc"
+mjpegb_decoder_select="mjpeg_decoder"
 mlp_decoder_select="dsputil mlp_parser"
 motionpixels_decoder_select="dsputil"
 mp1_decoder_select="mpegaudio"
@@ -1783,9 +1784,9 @@ svq3_decoder_select="h264_decoder hpeldsp mpegvideo"
 svq3_decoder_suggest="zlib"
 tak_decoder_select="dsputil"
 theora_decoder_select="vp3_decoder"
+thp_decoder_select="mjpeg_decoder"
 tiff_decoder_suggest="zlib"
 tiff_encoder_suggest="zlib"
-thp_decoder_select="mjpeg_decoder"
 truehd_decoder_select="mlp_decoder"
 truemotion2_decoder_select="dsputil"
 truespeech_decoder_select="dsputil"
@@ -1999,8 +2000,8 @@ ffrtmpcrypt_protocol_select="tcp_protocol"
 ffrtmphttp_protocol_deps="!librtmp_protocol"
 ffrtmphttp_protocol_select="http_protocol"
 gopher_protocol_select="network"
-httpproxy_protocol_select="tcp_protocol"
 http_protocol_select="tcp_protocol"
+httpproxy_protocol_select="tcp_protocol"
 https_protocol_select="tls_protocol"
 librtmp_protocol_deps="librtmp"
 librtmpe_protocol_deps="librtmp"
@@ -2040,8 +2041,8 @@ frei0r_src_filter_deps="frei0r dlopen"
 frei0r_src_filter_extralibs='$ldl'
 hqdn3d_filter_deps="gpl"
 interlace_filter_deps="gpl"
-resample_filter_deps="avresample"
 ocv_filter_deps="libopencv"
+resample_filter_deps="avresample"
 scale_filter_deps="swscale"
 
 # examples
@@ -2436,7 +2437,7 @@ case "$toolchain" in
         add_ldflags -fprofile-arcs -ftest-coverage
     ;;
     hardened)
-        add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
+        add_cflags  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all
         add_ldflags -Wl,-z,relro -Wl,-z,now
     ;;
     ?*)