doc/scaler, swscale/options: use proper capitalization

Proper names should be capitalized in all user facing API as far as
possible. The option names themselves have not been changed since:
1. We consistently keep option names in lower case.
2. Changing them would break existing scripts.

The converse is also true: improper names should not be capitalized
generally.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

doc/scaler.texi

@@ -46,7 +46,7 @@ Select Gaussian rescaling algorithm.
 Select sinc rescaling algorithm.
 
 @item lanczos
-Select lanczos rescaling algorithm.
+Select Lanczos rescaling algorithm.
 
 @item spline
 Select natural bicubic spline rescaling algorithm.

libswscale/options.c

@@ -42,9 +42,9 @@ static const AVOption swscale_options[] = {
     { "neighbor",        "nearest neighbor",              0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_POINT          }, INT_MIN, INT_MAX,        VE, "sws_flags" },
     { "area",            "averaging area",                0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_AREA           }, INT_MIN, INT_MAX,        VE, "sws_flags" },
     { "bicublin",        "luma bicubic, chroma bilinear", 0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_BICUBLIN       }, INT_MIN, INT_MAX,        VE, "sws_flags" },
-    { "gauss",           "gaussian",                      0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_GAUSS          }, INT_MIN, INT_MAX,        VE, "sws_flags" },
+    { "gauss",           "Gaussian",                      0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_GAUSS          }, INT_MIN, INT_MAX,        VE, "sws_flags" },
     { "sinc",            "sinc",                          0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_SINC           }, INT_MIN, INT_MAX,        VE, "sws_flags" },
-    { "lanczos",         "lanczos",                       0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_LANCZOS        }, INT_MIN, INT_MAX,        VE, "sws_flags" },
+    { "lanczos",         "Lanczos",                       0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_LANCZOS        }, INT_MIN, INT_MAX,        VE, "sws_flags" },
     { "spline",          "natural bicubic spline",        0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_SPLINE         }, INT_MIN, INT_MAX,        VE, "sws_flags" },
     { "print_info",      "print info",                    0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_PRINT_INFO     }, INT_MIN, INT_MAX,        VE, "sws_flags" },
     { "accurate_rnd",    "accurate rounding",             0,                 AV_OPT_TYPE_CONST,  { .i64  = SWS_ACCURATE_RND   }, INT_MIN, INT_MAX,        VE, "sws_flags" },