Rpm: don't use update-alternatives

Even if I set rpm as conflicting with TigerVNC, update-alternatives
breaks in post-install. That is because files like /usr/bin/vncserver
are left from TigerVNC, when post-install runs.

So, I chose to use /usr/bin/vncserver without update-alternatives.

centos/kasmvncserver.spec

@@ -8,7 +8,7 @@ URL: https://github.com/kasmtech/KasmVNC
 
 BuildRequires: rsync
 Requires: xorg-x11-xauth, xorg-x11-xkb-utils, xkeyboard-config, xorg-x11-server-utils, openssl, perl
-Conflicts: tigervnc-server
+Conflicts: tigervnc-server, tigervnc-server-minimal
 
 %description
 
@@ -19,6 +19,12 @@ Lorem ipsum
 %install
 rm -rf $RPM_BUILD_ROOT
 DESTDIR=$RPM_BUILD_ROOT make -f /src/debian/Makefile.to_fakebuild_tar_package install
+cd $RPM_BUILD_ROOT/usr/bin && mv Xkasmvnc Xvnc && \
+  mv kasmvncserver vncserver && mv kasmvncconfig vncconfig && \
+  ln -s kasmvncpasswd vncpasswd
+cd $RPM_BUILD_ROOT/usr/share/man/man1 && mv Xkasmvnc.1 Xvnc.1 && \
+  mv kasmvncserver.1 vncserver.1 && mv kasmvncconfig.1 vncconfig.1 && \
+  mv kasmvncpasswd.1 vncpasswd.1
 
 %files
 /usr/bin/*
@@ -33,18 +39,6 @@ DESTDIR=$RPM_BUILD_ROOT make -f /src/debian/Makefile.to_fakebuild_tar_package in
 - Initial release of the rpm package.
 
 %post
-  bindir=/usr/bin
-  mandir=/usr/share/man
-  commands="kasmvncserver kasmvncpasswd kasmvncconfig Xkasmvnc"
-
-  for kasm_command in $commands; do
-    generic_command=`echo "$kasm_command" | sed -e 's/kasm//'`;
-    update-alternatives --install "$bindir/$generic_command" \
-      "$generic_command" "$bindir/$kasm_command" 90 \
-      --slave "$mandir/man1/$generic_command.1.gz" "$generic_command.1.gz" \
-        "$mandir/man1/$kasm_command.1.gz"
-  done
-
   kasmvnc_group="kasmvnc"
 
   create_kasmvnc_group() {
@@ -69,13 +63,4 @@ DESTDIR=$RPM_BUILD_ROOT make -f /src/debian/Makefile.to_fakebuild_tar_package in
   make_self_signed_certificate
 
 %postun
-  bindir=/usr/bin
-  mandir=/usr/share/man
-  commands="kasmvncserver kasmvncpasswd kasmvncconfig Xkasmvnc"
-
-  for kasm_command in $commands; do
-    generic_command=`echo "$kasm_command" | sed -e 's/kasm//'`;
-    update-alternatives --remove "$generic_command" "$bindir/$kasm_command"
-  done
-
   rm -f /etc/pki/tls/private/kasmvnc.pem