spelling: use 'reuse' not 're-use' in code and elsewhere

Unify the spelling as both versions were previously used intermittently

Closes #11717

tests/data/test1096

@@ -21,7 +21,7 @@ REPLY SIZE 500 command not understood
 ftp
 </server>
  <name>
-Two FTP downloads, with failed RETR but re-used control connection
+Two FTP downloads, with failed RETR but reused control connection
  </name>
  <command>
 ftp://%HOSTIP:%FTPPORT/dir/%TESTNUMBER ftp://%HOSTIP:%FTPPORT/dir/%TESTNUMBER

tests/data/test1134

@@ -35,7 +35,7 @@ contents2
 http
 </server>
  <name>
-HTTP connection re-use with different credentials
+HTTP connection reuse with different credentials
  </name>
  <command>
 http://%HOSTIP:%HTTPPORT/%TESTNUMBER -u user1:password1 --next http://%HOSTIP:%HTTPPORT/%TESTNUMBER0001 -u 2user:password2

tests/data/test1418

@@ -4,7 +4,7 @@
 HTTP
 HTTP GET
 HTTP NTLM auth
-connection re-use
+connection reuse
 </keywords>
 </info>
 # Server-side
@@ -84,7 +84,7 @@ http
 crypto
 </features>
  <name>
-HTTP with --anyauth and connection re-use
+HTTP with --anyauth and connection reuse
  </name>
  <command>
 http://%HOSTIP:%HTTPPORT/%TESTNUMBER -u testuser:testpass --anyauth http://%HOSTIP:%HTTPPORT/%TESTNUMBER0003

tests/data/test1419

@@ -4,7 +4,7 @@
 HTTP
 HTTP GET
 HTTP NTLM auth
-connection re-use
+connection reuse
 </keywords>
 </info>
 # Server-side
@@ -42,7 +42,7 @@ Feel free to get it
 http
 </server>
  <name>
-HTTP with --anyauth (but no auth!) and connection re-use
+HTTP with --anyauth (but no auth!) and connection reuse
  </name>
  <command>
 http://%HOSTIP:%HTTPPORT/%TESTNUMBER --anyauth http://%HOSTIP:%HTTPPORT/%TESTNUMBER0003

tests/data/test1542

@@ -2,7 +2,7 @@
 <info>
 <keywords>
 HTTP
-connection re-use
+connection reuse
 persistent connection
 CURLOPT_MAXLIFETIME_CONN
 verbose logs

tests/data/test1632

@@ -49,7 +49,7 @@ ftp
 https-proxy
 </server>
  <name>
-FTP through HTTPS-proxy, with connection re-use
+FTP through HTTPS-proxy, with connection reuse
  </name>
  <command>
 -p -x https://%HOSTIP:%HTTPSPROXYPORT ftp://ftp.site.thru.https.proxy:%FTPPORT/%TESTNUMBER --proxy-insecure ftp://ftp.site.thru.https.proxy:%FTPPORT/%TESTNUMBER0002

tests/data/test2046

@@ -49,7 +49,7 @@ LC_CTYPE=en_US.UTF-8
 perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
 </precheck>
  <name>
-Connection re-use with IDN host name
+Connection reuse with IDN host name
  </name>
 
  <command>

tests/data/test2047

@@ -50,7 +50,7 @@ LC_CTYPE=en_US.UTF-8
 perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
 </precheck>
  <name>
-Connection re-use with IDN host name over HTTP proxy
+Connection reuse with IDN host name over HTTP proxy
  </name>
 
  <command>

tests/data/test2306

@@ -44,7 +44,7 @@ lib%TESTNUMBER
 </tool>
 
  <name>
-HTTP GET re-used handle with first header folded
+HTTP GET reused handle with first header folded
  </name>
  <command>
 http://%HOSTIP:%HTTPPORT/%TESTNUMBER http://%HOSTIP:%HTTPPORT/%TESTNUMBER0002

tests/data/test435

@@ -23,7 +23,7 @@ Content-Length: 0
 http
 </server>
 <name>
-verify -w local/remote port+ip after connection re-use
+verify -w local/remote port+ip after connection reuse
 </name>
 <command>
 http://%HOSTIP:%HTTPPORT/%TESTNUMBER http://%HOSTIP:%HTTPPORT/%TESTNUMBER -w 'local port == %{local_port}\nlocal ip == %{local_ip}\nremote_ip == %{remote_ip}\nremote_port == %{remote_port}\n'

tests/data/test675

@@ -24,7 +24,7 @@ the content would go here
 http
 </server>
  <name>
-HTTP connection re-use and different credentials
+HTTP connection reuse and different credentials
  </name>
 
 <command>

tests/data/test836

@@ -4,7 +4,7 @@
 IMAP
 Clear Text
 FETCH
-connection re-use
+connection reuse
 </keywords>
 </info>
 

tests/data/test882

@@ -4,7 +4,7 @@
 POP3
 Clear Text
 RETR
-connection re-use
+connection reuse
 </keywords>
 </info>
 

tests/data/test938

@@ -4,7 +4,7 @@
 SMTP
 SASL
 SASL AUTH PLAIN
-connection re-use
+connection reuse
 RFC4616
 RFC4954
 </keywords>