fix bug for Network file system

[mingkyme]

I fixed some bug for network file system.

It help to using embed library with import inner amber files.

doctype
html
    head
    body
        import components/header
        h1 Hi
        h2 Hi Hi
        import components/footer

for example
visit https://github.com/mingkyme/golang-embed-amber

[ReneWerner87]

Please provide a unittests for this fix

[mingkyme]

@ReneWerner87 I added test module.

[mingkyme]

For keeping go version to 1.13 (following on README.md)
Have to remove "embed" module.

[ReneWerner87]

For keeping go version to 1.13 (following on README.md) Have to remove "embed" module.

ok thats fine for me

[ReneWerner87]

@mingkyme can you do the last changes ?

[mingkyme]

@ReneWerner87 I removed test codes for keeping go version.

[ReneWerner87]

thx

https://github.com/valyala/fasthttp/blob/7a5afddf5b805a022f8e81281c772c11600da2f4/client_timing_wait_test.go#L1-L2
@mingkyme can you try one more thing for me ? move those tests you removed to a separate file and create this comment header above with the minimum version

think then they will be skipped in the old versions and we still have tests for the new embed feature

[mingkyme]

I did.