xbps-src: document all options

xbps-src

@@ -143,6 +143,8 @@ zap
 
 Options:
 
+-1  If dependencies of target package are missing, fail instead of building them.
+
 -a  <target>
     Cross compile packages for this target machine. Supported targets:
 
@@ -175,6 +177,8 @@ $(print_cross_targets)
 
 -I  Ignore required dependencies, useful for extracting/fetching sources.
 
+-i  Make xbps-src internal errors non-fatal.
+
 -j  Number of parallel build jobs to use when building packages.
 
 -L  Disable ASCII colors.
@@ -210,6 +214,8 @@ $(print_cross_targets)
     Once the target has finished, this temporary masterdir will be removed.
     This flag requires xbps-uchroot(1).
 
+-V  Print version of xbps, then exit.
+
 _EOF
 }