Remove --false-start flag

Remove the --false-start flag completely. In the Chrome version it has
no affect, and in the Firefox version it may cause connection errors.
This flag doesn't seem to affect TLS or HTTP signatures so is safe to
remove.

The flag seems to cause connection errors with some
http/2 servers. The server chooses http/2 based on alpn but curl
initiates a http/1.1 connection instead. This is an upstream bug in curl
that affects us as well.

chrome/curl_chrome100

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_chrome101

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_chrome104

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_chrome107

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --http2-no-server-push --false-start --compressed \
+    --http2 --http2-no-server-push --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_chrome110

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --http2-no-server-push --false-start --compressed \
+    --http2 --http2-no-server-push --compressed \
     --tlsv1.2 --alps --tls-permute-extensions \
     --cert-compression brotli \
     "$@"

chrome/curl_chrome116

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --http2-no-server-push --false-start --compressed \
+    --http2 --http2-no-server-push --compressed \
     --tlsv1.2 --alps --tls-permute-extensions \
     --cert-compression brotli \
     "$@"

chrome/curl_chrome99

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_chrome99_android

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_edge101

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_edge99

@@ -20,7 +20,7 @@ dir=${0%/*}
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --alps \
     --cert-compression brotli \
     "$@"

chrome/curl_safari15_3

@@ -14,7 +14,7 @@ dir=${0%/*}
     -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' \
     -H 'Accept-Language: en-us' \
     -H 'Accept-Encoding: gzip, deflate, br' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.0 --no-tls-session-ticket \
     --http2-pseudo-headers-order 'mspa' \
     "$@"

chrome/curl_safari15_5

@@ -14,7 +14,7 @@ dir=${0%/*}
     -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' \
     -H 'Accept-Language: en-GB,en-US;q=0.9,en;q=0.8' \
     -H 'Accept-Encoding: gzip, deflate, br' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.0 --no-tls-session-ticket \
     --cert-compression zlib \
     --http2-pseudo-headers-order 'mspa' \

docs/02_USAGE.md

@@ -50,7 +50,7 @@ The important part of the script is:
     -H 'Sec-Fetch-Dest: document' \
     -H 'Accept-Encoding: gzip, deflate, br' \
     -H 'Accept-Language: en-US,en;q=0.9' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     --tlsv1.2 --no-npn --alps \
     --cert-compression brotli \
     "$@"

firefox/curl_ff100

@@ -18,5 +18,5 @@ dir=${0%/*}
     -H 'Sec-Fetch-Site: none' \
     -H 'Sec-Fetch-User: ?1' \
     -H 'TE: Trailers' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     "$@"

firefox/curl_ff102

@@ -18,5 +18,5 @@ dir=${0%/*}
     -H 'Sec-Fetch-Site: none' \
     -H 'Sec-Fetch-User: ?1' \
     -H 'TE: Trailers' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     "$@"

firefox/curl_ff109

@@ -18,5 +18,5 @@ dir=${0%/*}
     -H 'Sec-Fetch-Site: none' \
     -H 'Sec-Fetch-User: ?1' \
     -H 'TE: Trailers' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     "$@"

firefox/curl_ff117

@@ -18,5 +18,5 @@ dir=${0%/*}
     -H 'Sec-Fetch-Site: none' \
     -H 'Sec-Fetch-User: ?1' \
     -H 'TE: Trailers' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     "$@"

firefox/curl_ff91esr

@@ -18,5 +18,5 @@ dir=${0%/*}
     -H 'Sec-Fetch-Site: none' \
     -H 'Sec-Fetch-User: ?1' \
     -H 'TE: Trailers' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     "$@"

firefox/curl_ff95

@@ -18,5 +18,5 @@ dir=${0%/*}
     -H 'Sec-Fetch-Site: none' \
     -H 'Sec-Fetch-User: ?1' \
     -H 'TE: Trailers' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     "$@"

firefox/curl_ff98

@@ -18,5 +18,5 @@ dir=${0%/*}
     -H 'Sec-Fetch-Site: none' \
     -H 'Sec-Fetch-User: ?1' \
     -H 'TE: Trailers' \
-    --http2 --false-start --compressed \
+    --http2 --compressed \
     "$@"