title: Reading shape file with sf::st_read fails to capture encoding UTF8
body: <p>I want to read a shape file which is encoded in <code>UTF8</code>. It works fine when I read it using <code>rgdal::readOGR</code> but <code>sf::st_read</code> fails to get the correct Encode. Any suggestions on how to solve this?</p>
  
  <p>For a reproducible example, the shape file I'm trying to read can be downloaded <a href="ftp://geoftp.ibge.gov.br/organizacao_do_territorio/malhas_territoriais/malhas_municipais/municipio_2010/ac/ac_municipios.zip" rel="noreferrer">here</a>.</p>
  
  <h3>Reading with <code>rgdal::readOGR</code></h3>
  
  <pre><code>shp &lt;- rgdal::readOGR(shp_file, encoding = "UTF-8")
  head(shp@data)
  
  &gt;   ID CD_GEOCODM      NM_MUNICIP
  &gt; 0 53    1200013      ACRELÂNDIA
  &gt; 1 54    1200054    ASSIS BRASIL
  &gt; 2 55    1200104       BRASILÉIA
  &gt; 3 56    1200138          BUJARI
  &gt; 4 57    1200179        CAPIXABA
  &gt; 5 58    1200203 CRUZEIRO DO SUL
  </code></pre>
  
  <h3>Reading with <code>sf::st_read</code></h3>
  
  <pre><code>  sf &lt;- sf::st_read(shp_file, stringsAsFactors=F, options = "ENCODING=UTF8")
    head(sf)
  
  
  &gt;   ID CD_GEOCODM      NM_MUNICIP                       geometry
  &gt; 1 53    1200013   ACREL&lt;c2&gt;NDIA POLYGON ((-67.14117 -9.6833...
  &gt; 2 54    1200054    ASSIS BRASIL POLYGON ((-69.79978 -10.506...
  &gt; 3 55    1200104    BRASIL&lt;c9&gt;IA POLYGON ((-69.58835 -10.643...
  &gt; 4 56    1200138          BUJARI POLYGON ((-68.31643 -9.2954...
  &gt; 5 57    1200179        CAPIXABA POLYGON ((-67.84667 -10.287...
  &gt; 6 58    1200203 CRUZEIRO DO SUL POLYGON ((-72.89221 -7.4995...
  
  
  # I have also tried manually adding the encoding but it still doesn't work.
  
  sf &lt;- sf::st_read(shp_file, stringsAsFactors=F, options = "ENCODING=UTF8")
  Encoding(sf$NM_MUNICIP) &lt;- "UTF-8"
  sf$NM_MUNICIP
  
  &gt; [1] "ACREL\xc2NDIA"        "ASSIS BRASIL"         "BRASIL\xc9IA"         "BUJARI"              
  &gt; [5] "CAPIXABA"             "CRUZEIRO DO SUL"      "EPITACIOL\xc2NDIA"    "FEIJ\xd3"            
  &gt; [9] "JORD\xc3O"            "M\xc2NCIO LIMA"       "MANOEL URBANO"        "MARECHAL THAUMATURGO"
  &gt; [13] "PL\xc1CIDO DE CASTRO" "PORTO WALTER"         "RIO BRANCO"           "RODRIGUES ALVES"     
  &gt; [17] "SANTA ROSA DO PURUS"  "SENADOR GUIOMARD"     "SENA MADUREIRA"       "TARAUAC\xc1"         
  &gt; [21] "XAPURI"               "PORTO ACRE"          
  
  
  </code></pre>
  
  <p>The same problem occurs with other shape files, like <a href="ftp://geoftp.ibge.gov.br/organizacao_do_territorio/malhas_territoriais/malhas_municipais/municipio_2000/ac/ac_municipios.zip" rel="noreferrer">this other one</a>, so I don't think this is a problem of the file itself.</p>